I've noticed over the last few days that sometimes the car is a little hesitant to shift while driving. I'm not sure if I'm just holding the gear with the gas pedal and not realizing it or what, but it's a little worrying. I also had brought the car into work and my tech buddy was sitting in it and said "Why does it shake when it idles?" "I don't know. I heard a lot of them do." "It feels like it's got a miss." ".. Huh.."

So, for the sake of not having to start another topic - has anyone else got any more information on the shaky idle?

Mine shakes a little too. I thought it might be the AFM running on 4 cylinders possibly causing the shake.

I've had weird shifts too but mainly downshifts that are not coming when expected like when flooring it. But after reading some more people's responses here and 'rolling into' the throttle instead i seem to avoid it.(and of course sports mode can hold gears longer than in 'normal' mode)

my engine shakes when idling, especially first thing in the morning. just runs a little rough I guess. Not the whole car though.. If you wanna compare let me know.

occasional rough idle here too. seesm to be the nature of the beast although i'm not sure why sometimes it idles very smoothly...then other times the whole car shakes. and it can change it's nature from one stop light to the next...odd!

That would be good. Let me know when you're free. I'm going to the test and tune at Bremerton in the 8th, or I have Monday off work.

Not the whole car though.. If you wanna compare let me know.

A slightly rough idle a common characteristic of the LSX motors. My GTO had it, and so does the G8. My wife's V6 Buick idles more smoothly, but I'd rather drive the Pontiac.

it shakes because all that horsepower its making!!!

The motor has a pretty decent camshaft in it that causes the rough idle ,also causes 360hp.

Everyone has the rough idle at times. I've checked with dashhawk and it shows 0 misfires, ever. It's not missing, just a tad rough at times.

MissNaySimon, my G8 GT has had a "lumpy" idle since the day I bought it. Surprised me a bit at first but the car runs well and I just put it down to it being part of the car's character.

As far as the hesitant and slow shifting - there are numerous complaints about the transmission in other threads, so what you are experiencing is not unique.

The motor has a pretty decent camshaft in it that causes the rough idle ,also causes 360hp.
Well said. :D

From a computer nerd perspective, it could all be explained thru programing. In reality computers can only process one thing at one time, that is why they have ram to store a list of things for the processor to do next. I would guess that they programed it to turn off the AFM before it enables the clutch and the code would probally be something like reinitialize injector 2, 4, 6, 8 and all the other functions it needs to do to re-enable all 8 cylinders, then clutch, then shift, etc... So my theory is that it is computer lag, not mechanical lag.

Master-at-Arms;78778']From a computer nerd perspective, it could all be explained thru programing. In reality computers can only process one thing at one time, that is why they have ram to store a list of things for the processor to do next. I would guess that they programed it to turn off the AFM before it enables the clutch and the code would probally be something like reinitialize injector 2, 4, 6, 8 and all the other functions it needs to do to re-enable all 8 cylinders, then clutch, then shift, etc... So my theory is that it is computer lag, not mechanical lag.
If you're talking about the transmission's balky shifting, there is no doubt that it is a programming issue. Other threads have discussed this subject extensively. However, the AFM isn't the culprit since the transition time is on the order of 100ms, and even though the processor might be pumping out instructions serially (not necessarily, though), the processor speed is much faster than the mechanical and hydraulic systems can react - so the net effect is of simultaneous commands.

Anyhow, Vector Motorsports' aftermarket chip tune for the ECM and the TCM largely fix the shifting behavior so programming is indeed the culprit.

The trans has the ability to adapt to your driving style to a point, Vms ecm-tcm will solve most shifting problems. It's night and day over the stock program.

The transmission must have been programmed by a 10 year old. This is really my only complain with this otherwise great car.
As far as the rough idle, it's the nature of the beast, as stated. The AFM has nothing to do with it because it does not operate at idle.
Just an FYI to anyone interested, when AFM is active, the four inside cylinders are shut off leaving the four corners active.

mac

The transmission must have been programmed by a 10 year old. This is really my only complain with this otherwise great car.
As far as the rough idle, it's the nature of the beast, as stated. The AFM has nothing to do with it because it does not operate at idle.
Just an FYI to anyone interested, when AFM is active, the four inside cylinders are shut off leaving the four corners active.

mac

sry, I wasnt sure which ones it was just thru those numbers out, but tnx.

Talked to the dealer yesterday and they verified the rough idle and shifting issues. They found a service bulletin for the trans and reprogrammed it, it made a huge difference.:driving:

everybody has the rough idle. I have had my car since the end of april and put 3000 miles on it without a single problem.

everybody has the rough idle. I have had my car since the end of april and put 3000 miles on it without a single problem.

I had a rough idle, but it was gone after they flashed it last week. No lag, shifts are perfect and the car finally drives exactly like it should.

I can't stop driving nowe :gears:

So if you have any problems, take it in to have the computer updated. I noticed a night and day difference.

Talked to the dealer yesterday and they verified the rough idle and shifting issues. They found a service bulletin for the trans and reprogrammed it, it made a huge difference.:driving:

find out what bulletin # it was 'cause my dealer said there was nothing(that was only a month ago)

I would love this done!!!

that's good to know, thanks for the update!

find out what bulletin # it was 'cause my dealer said there was nothing(that was only a month ago)

I would love this done!!!

Take it in next week. I had mine done on Thursday of last week. I must have gotten the latest because it drives exactly like my 4 speed auto did (instant response), plus the auto trans braking/down shifting to slow works like it should.

The car is so much more fun to drive now.

everybody has the rough idle. I have had my car since the end of april and put 3000 miles on it without a single problem.
Almost, but not "everyone". :p

Take it in next week. I had mine done on Thursday of last week. I must have gotten the latest because it drives exactly like my 4 speed auto did (instant response), plus the auto trans braking/down shifting to slow works like it should.

The car is so much more fun to drive now.


On your invoice what did it say for the update? Was there a number associated with it? I'd like to check with the dealer if my car needs this over the phone. I too have the problems but like someone said above, my dealer said it was up to date about a month ago.

Thanks.

On your invoice what did it say for the update? Was there a number associated with it? I'd like to check with the dealer if my car needs this over the phone. I too have the problems but like someone said above, my dealer said it was up to date about a month ago.

Thanks.

They told me the only way to tell is to plug you in:wink2:

http://i297.photobucket.com/albums/mm227/srg963/8-24-200883342PM.jpg

That looks like it could be new. I checked TIS2WEB and I don't have any of those updates listed as being applied to my car.

Thanks again. I'm taking it in.

does this apply to '09s

does this apply to '09s

I have no idea, seems to be a pretty new update.

So if you have any problems, take it in to have the computer updated. I noticed a night and day difference.
Is there any way for me to check for the current firmware that is running on the ECM/TCM? I had mine done and I really didn't notice any difference. There are some version numbers displayed in Engineering Mode. Do they reflect the current firmware installed? If so, what should the numbers be?

Is there any way for me to check for the current firmware that is running on the ECM/TCM? I had mine done and I really didn't notice any difference. There are some version numbers displayed in Engineering Mode. Do they reflect the current firmware installed? If so, what should the numbers be?

Told me the only way to know is to plug it in to the computer :wink2::wink2:

The tech that did it gave me a print out of the bulletin. The number on the bulletin they did on mine was.#08-07-30-036 automatic transmission delayed downshift, lack of acceleration, flat spot(reprogram tcm) aug 13, 2008. Says it is for 08-09 gt models built prior to vin breakpoint 9l210304.

The tech that did it gave me a print out of the bulletin. The number on the bulletin they did on mine was.#08-07-30-036 automatic transmission delayed downshift, lack of acceleration, flat spot(reprogram tcm) aug 13, 2008. Says it is for 08-09 gt models built prior to vin breakpoint 9l210304.Does that 9 mean it's an '09 model? If so, then this would apply to all '08s right?

does this apply to '09s

I had my 09 reprogrammed last week. HUGE difference.

Does that 9 mean it's an '09 model? If so, then this would apply to all '08s right?

I think it does, and it looks like this just came out this month. I hope it applies to my car. I've been complaining to the dealer about this issue since may and was ready to pay someone to tune this out.

It sure would be nice to "fix" this w/o having to wait for the funds for a full blown tune. ;)

They told me the only way to tell is to plug you in:wink2:

http://i297.photobucket.com/albums/mm227/srg963/8-24-200883342PM.jpg

So if you drop hammer does it actually kick down and go now, or does it still sit there twiddling its thumbs for 5 seconds figuring out what to do?

Sounds like i need to send my car to the dealer for an oil change and this update!!!!!

interesting...is this an update to 08150...or an entirely different update? taking my car in today for oil change...

interesting...is this an update to 08150...or an entirely different update? taking my car in today for oil change...
I've had #08150 done on mine and really didn't notice any difference. If there is another flash available, please post the Bulletin Number.

I am pritty sure there is only one update for the transmission.
I checked couple of web sites like All Data and they say only 2 TSBS
for this car. one for airbag chime and the other ECM/TCM update.
So if anyone has a definite answer to this please let us know.
Who ever had it done few days ago, you can call the dealer and find out. We are all waiting for them to come out with this update..

I called my dealer and they didn't know anything about this service bulletin.

I am pritty sure there is only one update for the transmission.
I checked couple of web sites like All Data and they say only 2 TSBS
for this car. one for airbag chime and the other ECM/TCM update.
So if anyone has a definite answer to this please let us know.
Who ever had it done few days ago, you can call the dealer and find out. We are all waiting for them to come out with this update..

Had my car in for service on Saturday and they said they did an update on mine, but didn't say which. I think it was for the TCM, because it now shifts quicker/harder in all modes, but still has a slight hesitation if you punch it in auto.

I've had #08150 done on mine and really didn't notice any difference. If there is another flash available, please post the Bulletin Number.

Same here. #08150 did nothing to improve the sluggish shifting.

just got back from oil change/service updates visit. jury is still out on the idle...tranny and throttle both seem smoother and quicker in their responses, especially at low speeds.

now for the visit. when i went in i mentioned the rough idle, hesitation on takeoff and generally poor performance of the tranny. as i'm waiting in the lobby, service writer comes in and says he found a service bulletin on the tranny. i ask, is it 08150. he gets a strange look on his face. so we go out to his computer in the service area. he starts poking around. and initially claims that 08150 isn't for the powertrain. then changes his tune and says it'll take about a half hour to hook up the car and load the service bulletin(s). from what i could tell, there were two different bulletins for the car pertaining to the powertrain. but i can't prove that because my receipt only refers to my complaints; and that warranty work was done.

anyway, i asked him to just go on ahead and load any and all service bulletins that are applicable to my car. he looks at me and says they can't unless i have a specific complaint! so, i give up and say just be sure then to load anything pertaining to the powertrain. why do they have to have a complaint in order to load new software that fixes problems?? i don't get it!!

Same here. #08150 did nothing to improve the sluggish shifting.

I'm not sure about 8150 other than those numbers are not on any of my paperwork.....bought my car in April, took it in last Thursday and there is a night and day difference.

After this update, there was no more lag and no more thinking about which gear to use BS.
When I come up to a stop or a speed bump, rolling thru then hammer down, I have instant response with a nice squeal.

I love a free fix. The car finally drives as it should.

I'd suggest everyone that owns a G8GT - Go get this update at the dealership (call ahead and make appointment). Should take 30 min max.

Also have them check the fluid.

just got back from oil change/service updates visit. jury is still out on the idle...tranny and throttle both seem smoother and quicker in their responses, especially at low speeds.

It will still shake a little as it should, but it won't come close to stalling out. Mine used to drop to around 400 rpms and almost die. Now it's a very quick stop and go with no hesitation at all.

It will still shake a little as it should, but it won't come close to stalling out. Mine used to drop to around 400 rpms and almost die. Now it's a very quick stop and go with no hesitation at all.

i don't recall mine ever dropping that low on rpms...but it still would shake quite a bit. and it was so weird because it would be glass smooth at one stop-light...then run as if only operating on 5 cylinders at the very next stop-light. odd! hopefully this "re-tune" got rid of that behaviour!

anyway, i ask him to just go on ahead and load any and all service bulletins that are applicable to my car. he looks at me and says they can't unless i have a specific complaint!
That's different from my dealer experience. I called the closest Pontiac dealer (incidentally, not the dealer from which I purchased the car) and asked the service writer who answered to research outstanding campaigns for my VIN. He found two - one for the passenger side seat belt chime, and #08150 which is an ECM and TCM reflash.

I asked if I could bring the car in just to have the campaigns done and he said sure, no prob. When I picked the car up there was no charge, the invoice listed the campaigns and said "Per customer request," and they washed the car for me! :)

Too bad it didn't help the shifting any. :drink:

The tech that did it gave me a print out of the bulletin. The number on the bulletin they did on mine was.#08-07-30-036 automatic transmission delayed downshift, lack of acceleration, flat spot(reprogram tcm) aug 13, 2008. Says it is for 08-09 gt models built prior to vin breakpoint 9l210304.

You guys are freaking amazing... I just got off the phone with the service dept at my dealership. After he read through the initial service bulletin about the .7 second delay I gave him this service number and he said, that's right below it. He verified that my '09 was eligible for the update and that there weren't any more recent warnings against it and set me up for an appointment on Saturday to get it fixed.

I love this group....

I

8150 did absolutely nothing for my initial throttle response. It did, however, mildly help firm up the shifts in sport mode and it also seems to shift more intelligently in sport mode after the update. Additionally, my rough idle was improved. Still a little occassional shake at idle but not as noticeable as pre-8150 update.

Someone once wrote on this board that they did a few WOT runs and it helped with throttle response. I've also done this and it does seem to "learn/adapt" to how you drive. Try it and report back.

I am glad to hear about the correction of some of the NVH. The changes will be pretty noticeable to me if they are corrected in some way since I pull out of our development on to a 55mph road and many times I do it from a rolling stop.

It is good to see, though, that GM is making changes to fix a problem, even if it isn't fully fixed on the first pass.

Perhaps I missed it, but has anyone definitively answered if there is a newer update than 8150 for TCM/Driveablity issues? From what I have gathered 8150 is for those that took very early delivery of cars in March and April. Those of us that got the "2nd batch" in May or later, already have this update from the factory, however we are still looking for relief for the slow shifting/hesitation issues. Is there a new update for us, and if so, what is the number we should provide to the dealer? Thanks!

Is there a way to search on the Internet to find bulletins for your G8?

Yes. NHTSA.
Edmunds....etc..

I went to the Edmunds Maintenance Guide page, and ran a search on my 2008 Pontiac G8 GT 4dr Sedan (6.0L 8cyl 6A).

Results came up: "There are no Service Bulletins for your vehicle."

On the NHTSA web site I could only find information on complaints, recalls, and defects. No service bulletins or campaigns. Maybe I'm looking in the wrong spot.

guys, i can't prove it, but i think there is a seperate bulletin/fix for the hesitation problem. especially since it appears that some guys even with '09s have experienced this. i got mine flashed yesterday, and so far no hesitation issues.

and when i speak of hesitation issues, i mean when taking off from a complete stop the car would occasionally not react to my right foot for a second or so...and then take off like a streak of poo! that problem has been elminated.

guys, i can't prove it, but i think there is a seperate bulletin/fix for the hesitation problem. especially since it appears that some guys even with '09s have experienced this. i got mine flashed yesterday, and so far no hesitation issues.

and when i speak of hesitation issues, i mean when taking off from a complete stop the car would occasionally not react to my right foot for a second or so...and then take off like a streak of poo! that problem has been elminated.

Can you inquire with your dealer's service department to exactly what they did, and share it with us? I too have the hesitation issue, and would like to be armed with this info when i set up my first service appointment.

mac

I just called up the Dealer where I purchased my car from and he said there is no other tsb recalls on my car. which means that this is the first one that was available.. The only other thing I can think of is that who ever still has a problem after their TCM/ECM update, maybe the update was not applied correctly to the computer.
Do you gyes think its a possibilaty that some technisions do not know how to reprogram TCM properelly. they just reprogram the ECM

Just had my 09 done, the bulletin is #08-07-30-036, just give the tech the # and he can look it up. it is like night and day, no hestation, crisper shifts, finally it runs like it should.

thank you that really helped there is an update for sure they Dealer conferemd it

Dropped off my early build 09 this morning for vibration issue and mentioned the hesitiation and crappy tranmission.

He just called and said the rear wheels were outta balance and the transmission did indeed need a new update addressing drivability concerns.

I'll post back my impressions once it learns my driving behaviors.

Dropped off my early build 09 this morning for vibration issue and mentioned the hesitiation and crappy tranmission.

He just called and said the rear wheels were outta balance and the transmission did indeed need a new update addressing drivability concerns.

I'll post back my impressions once it learns my driving behaviors.

You will notice a difference the second you put your foot down. No more lag!

I just called my dealer and she will call me back if they know about this # 08-07-30-036. I hope so! :)

I just called my dealer and she will call me back if they know about this # 08-07-30-036. I hope so! :)

It is confirmed. I sent an email to my buddy who is a tech at the dealership where I bought mt car, and yes, that update is in the system under that number. He printed it out for me, so I could see it.

So, everyone who suffers from ED (electronic dysfunction) set up an appointment at your freindly neighborhood Pontiac store to get this fix.

mac

I have an appointment for tomorrow morning for the computer reprogramming. as soon as i am done i will let you gyes know
how it is. I cannot wait to have the car running like it should
have been from day one.

Have them also check the tranny fluid level. There has been 5 of us so far that were down from 2-4 qts, which is considerable considering its a 12 qt system. My fear is GM is putting a band aid on by just adjusting the tune. If the tranny remains low you're going to eventually get the same symptoms returning......Or worse!

Have them also check the tranny fluid level. There has been 5 of us so far that were down from 2-4 qts, which is considerable considering its a 12 qt system. My fear is GM is putting a band aid on by just adjusting the tune. If the tranny remains low you're going to eventually get the same symptoms returning......Or worse!

Everyone listen to that quote above. I was three quarts low. NEP topped it off and now the car feels much better and shifts correctly.

--Mike

Are you saying the tranny was that LOW from the factory? If there is no leak...why would it be low?

Are you saying the tranny was that LOW from the factory? If there is no leak...why would it be low?

Yup. NEP has checked 3 G8/GT's over the past two weeks all were 3 quarts low. It is a 12 quart system "Yes" I said 12. I couldn't believe it when I heard it but it is a big tranny. My guess is the trannys are shipped low so there is no spillage during transport over the ocean. I am betting dealers are suppose to top them off but they don't. Never hurts to check the level.

--Mike

Are you saying the tranny was that LOW from the factory? If there is no leak...why would it be low?

Some mechanic screwed up?

Does anyone know how they check tranny flued if there is no dip stick on this car ?

Does anyone know how they check tranny flued if there is no dip stick on this car ?

Yep. Put it on a lift, remove a plug, add fluid til it drips out. Say thank you GM....

Yep. Put it on a lift, remove a plug, add fluid til it drips out. Say thank you GM....

Yup. That is how NEP does it.

Yup. That is how NEP does it.

On another forum we are investigating the possibility of adding a dipstick. Should have more info within a day or 2 as to whether it will be possible with existing parts from other applications.

On another forum we are investigating the possibility of adding a dipstick. Should have more info within a day or 2 as to whether it will be possible with existing parts from other applications.
:thumbsup:

Yep. Put it on a lift, remove a plug, add fluid til it drips out.

Yup. That is how NEP does it.

Close to the procedure to check the fluid, but leaving out all the fun stuff.

Close to the procedure to check the fluid, but leaving out all the fun stuff.

Yea, very true. I did leave out the stuff like burning yourself on hot components and fluid since the car must be running and warm when this is done.

I just picked up mine from the dealer this morning for the usual throttle hesitation issues and the bizarre/delayed shifting everyone is noticing (plus they replaced the driver's side wheels). The service order says they applied TSB 08-07-30-036 to the TCM. I did not tell them any specific TSB number when I brought it in.

The transmission seems much less annoying now. Thankfully that throttle delay seems to be gone too. I think I need more seat time behind the wheel though to get a full impression but so far so good.

Isn't there an idiot light for low tranny fluid?

Isn't there an idiot light for low tranny fluid?

i don't think so. with dashhawk we can monitor fluid temp but not level so I'm thinking there is no sensor for level.

Are you saying the tranny was that LOW from the factory? If there is no leak...why would it be low?
Lol! Ummm....Easily! A bad hang over, switching back and forth on the line between V6's and V8's.....any number of reasons why it's low.

It is confirmed. I sent an email to my buddy who is a tech at the dealership where I bought mt car, and yes, that update is in the system under that number. He printed it out for me, so I could see it.

So, everyone who suffers from ED (electronic dysfunction) set up an appointment at your freindly neighborhood Pontiac store to get this fix.

mac
Can you post that printout for all to see?

Can you post that printout for all to see?

I would have, but it's laying on the kitchen table. I can do it when I get home.

mac

Yep. Put it on a lift, remove a plug, add fluid til it drips out. Say thank you GM....
:driving:
Since the transmission on this vehicle is not equipped with a fill tube and dipstick, the following procedure is used to rectify the transmission fluid level and to inspect the condition of the transmission fluid.

Important: The transmission fluid level must only be checked when the transmission fluid temperature (TFT) is between 30 - 50°C (80 - 122°F). If the TFT is not within the specified range, operate the vehicle to increase the temperature of the transmission fluid or allow the transmission fluid to cool. Correcting the transmission fluid level with a TFT outside this range will result in either an under-filled or over-filled transmission.

Observe the TFT using the driver information center (DIC) or a scan tool.
Start the engine and let the engine idle.
Important: Make sure that the engine RPM is between 500-800 RPM.

Depress and hold the brake pedal and move the shift lever through each gear range. Pause for at least 3 seconds in each gear position. Move the shift lever to PARK.
Let the engine idle for 1 minute.
Caution: Refer to Vehicle Lifting Caution in the Preface section.

Important: Do not switch the engine OFF.

Important: Make sure that the shift lever is in PARK position.

Raise the vehicle on a hoist and make sure that the vehicle is level.

http://www.g8board.com/forums/attachment.php?attachmentid=1734&stc=1&d=1219854803
Caution: The engine must be running when the transmission fluid fill plug is removed, or excessive fluid loss will occur. Transmission fluid may be hot. Since the actual fluid level is unknown, stand clear when removing the fill plug. Have a container ready to capture any lost fluid. Do not turn the engine off with the fill plug removed, as you can be injured by hot transmission fluid being expelled out of the oil fill opening.

Important: Continue to monitor the TFT. If the TFT rises above or drops below the specified range, install the transmission fluid level check plug (1) and repeat the previous steps.

Remove the transmission fluid level check plug (1) from the transmission fluid pan.
• If the transmission fluid (2) is flowing out of the transmission fluid pan inspection hole in a steady stream the transmission is over-filled. Let the transmission fluid (2) drain until the transmission fluid (2) drips from the transmission fluid pan inspection hole.

• If no transmission fluid (2) drips out of the transmission fluid pan inspection hole, the transmission is under-filled. Add transmission fluid (2) until the transmission fluid (2) drips out. Refer to Transmission Fluid Fill Procedure

Inspect the transmission fluid colour. The transmission fluid should be red or dark brown.
• If the transmission fluid colour is very dark or black and has a burnt odour, remove the transmission fluid pan. Inspect the transmission fluid and inside of the transmission fluid pan for excessive metal particles or other debris. A small amount of friction material inside the transmission fluid pan is normal. If large pieces of friction material or metal particles are seen in the transmission fluid or transmission fluid pan, overhaul the transmission and flush the transmission fluid cooler and transmission fluid cooler lines.

• If the transmission fluid appears cloudy or milky, it is an indication that the transmission fluid may be contaminated with engine coolant or water. Refer to Engine Coolant/Water in Transmission.

Notice: Refer to Fastener Notice in the Preface section.

Replace the transmission fluid level check plug (1).
Tighten
25 N·m (18 lb. ft)

Transmission Fluid Fill Procedure
Important: Perform this procedure for vehicles with transmissions that are not equipped with a fill tube and dipstick.
http://www.g8board.com/forums/attachment.php?attachmentid=1735&stc=1&d=1219855325




It may be necessary to use a long pair of 90 degree needle nose pliers to lift the plunger and remove the plug assembly.
Unlock the fill tube plug by lifting the plunger. Once the plunger is lifted, remove the entire plug assembly.

Determine the approximate amount of fluid needed to fill the transmission, based on the repair performed. Refer to Fluid Capacity Specifications in Transmission/Transaxle. To avoid an under-fill condition, slightly overfill the transmission, and then allow the extra fluid to drain during the fluid checking procedure.

http://www.g8board.com/forums/attachment.php?attachmentid=1736&stc=1&d=1219855447

Important: The J 45096 is being utilized as a convenient method to pump the fluid into the bottom pan. A suitable hand pump may also be used instead.
Using the J 45096-40 (1) and the J 45096 (2), or a suitable hand pump, add transmission fluid through the fill tube plug opening.

What a nightmare. We have got to find a dipstick and housing to fit.

I guess the point is that you are filling it from the top plug but checking it from the bottom plug. If it starts spilling from the top plug, then you are definitely overfilling it.

There is an overflow for the tranny, so the overfilling problem isn't as much of an issue as the underfilling.........

There is an overflow for the tranny, so the overfilling problem isn't as much of an issue as the underfilling.........

Not according to any GM Document for G8 or Holden VE ....

do you know there is an overflow on the tranny?

You will notice a difference the second you put your foot down. No more lag!

Does this update improve the shift speed in manual mode as well? I took a G8 for a test drive last weekend with my wife. I was rather aggravated when she commented that the manual shifts were much slower than the manual mode in her Acura TSX... :madsign3:

Does this update improve the shift speed in manual mode as well? I took a G8 for a test drive last weekend with my wife. I was rather aggravated when she commented that the manual shifts were much slower than the manual mode in her Acura TSX... :madsign3:

I noticed a big difference when the fluid was topped off. What is interesting is the shifts at low or mid RPM ranges were slow before. After the fluid was added the shifts became very consistent without having to have the RPM's way up. My guess is the increased line pressure. At 11.8 quarts of fluid, 3 or more quarts down is going to make a difference. Have the dealer check the tranny fluid level. Out of three cars checked by NEP, all were short at least 3 quarts.

--Mike

Not according to any GM Document for G8 or Holden VE ....

do you know there is an overflow on the tranny?
Yes. Mike at New Era can fill you in better on the set up, but there is an overflow tube.

Yes. Mike at New Era can fill you in better on the set up, but there is an overflow tube.

You spit a little out the overflow when they did your fill right? That was what Mike was saying.

--Mike

Ok
The only overflow tube I can find is on the first picture I posted, but for it to work the engine must be running and bottom plug must be removed since the pan plug actually caps that tube
Yes. Mike at New Era can fill you in better on the set up, but there is an overflow tube.

Ok
The only overflow tube I can find is on the first picture I posted, but for it to work the engine must be running and bottom plug must be removed since the pan plug actually caps that tube

I believe mine was running on the lift. Jay is correct ask Mike at NEP.

--Mike

I Out of three cars checked by NEP, all were short at least 3 quarts.

--Mike

Do you happen to know the VIN's or the manufacture date of the cars with low fluid? It would be interesting to know if this was an early on problem effiecting the 888 cars, or is it an ongoing problem which may even be effecting the '09s.

My 08 car was delivered in May of this year. Don't have the VIN with me, but I can get it.

I believe mine was running on the lift. Jay is correct ask Mike at NEP.

--Mike

I’m pretty sure he was referring to exactly the same overflow. Easiest way to fill it is to fill it from the top until it starts leaking from the bottom while the engine is running. On a side note, I never had an issue with transmission shifting or any other issues with transmission.

The only issue I’m having is the engine oil pan is leaking all over and as I found out yesterday, the bolts on the oil pan are loose.:( I tightened them up, we’ll see what happens..........

I’m pretty sure he was referring to exactly the same overflow. Easiest way to fill it is to fill it from the top until it starts leaking from the bottom while the engine is running. On a side note, I never had an issue with transmission shifting or any other issues with transmission.

The only issue I’m having is the engine oil pan is leaking all over and as I found out yesterday, the bolts on the oil pan are loose.:( I tightened them up, we’ll see what happens..........

Oh. By the way how loose were the bolts? Whats the torque spec? I haven't looked at mine.

--Mike

Does this update improve the shift speed in manual mode as well? I took a G8 for a test drive last weekend with my wife. I was rather aggravated when she commented that the manual shifts were much slower than the manual mode in her Acura TSX... :madsign3:

the dealership did check all levels, so I really don't know if it's the update or the fluid fill.

all I can say is it drives like it should now. If you have any problems with your car, take it in and have them look at it.

something I've noticed with the manual mode is that it reacts differently if you go from sport to manual and drive to manual.

At speeds in which you would turn onto another street:
It will down shift to help slow if switching from sport to manual.
It will down shift but not help you slow if you go from drive to manual.

Someone else please verify this.

something I've noticed with the manual mode is that it reacts differently if you go from sport to manual and drive to manual.

At speeds in which you would turn onto another street:
It will down shift to help slow if switching from sport to manual.
It will down shift but not help you slow if you go from drive to manual.

Someone else please verify this.

You can't really go from drive to manual without passing thru sport...

You can't really go from drive to manual without passing thru sport...

well, I go directly to it :), it may flicker S, but I don't think it has time to engage.

well, I go directly to it :), it may flicker S, but I don't think it has time to engage.

I'm sure the Pontiac engineers LOVE people like you. LOL

Engineer 1: What happens if the driver tries to shift directly from Drive to Manual?
Engineer 2:Come on, who the hell would try that? :driving:

Just made an appointment with my dealer to see if they can address this issue for me. He encouraged me to bring the service bulletin # because it might save them a little time. I will report back the results of this experience.

FYI, the service advisor I booked my appointment with mentioned he's hearing a fair amount of similiar issues with the e-throttle on the lucernes. Maybe it is just related to the e-throttle? We'll see.

i had both the latest TCM reflash and campaign 08150 done to my car...and there is a pretty significant difference. no more throttle lag, and even the idle is a tad better. now just a slight shudder where as before the whole car would occasionally shake! tranny also seems a bit more sorted out about what it's wants to do. as for sport mode or manual shifting...can't say for sure about this as i haven't had time to test.

Oh. By the way how loose were the bolts? Whats the torque spec? I haven't looked at mine.

--Mike

Very loose and non of them tided the same to…
GM Specifications
Tighten (1)
Tighten the bolt to 25 N•m (18 lb ft).
Tighten (2)
Tighten the bolt to 12 N•m (106 lb in).
http://www.g8board.com/forums/attachment.php?attachmentid=1737&stc=1&d=1219868340

Just made an appointment with my dealer to see if they can address this issue for me. He encouraged me to bring the service bulletin # because it might save them a little time. I will report back the results of this experience.


can't they just hook up the car to their computer system and automatically be able to tell which updates your car needs?? i get confused as to why they even need to search at all. am i wrong about this??

can't they just hook up the car to their computer system and automatically be able to tell which updates your car needs?? i get confused as to why they even need to search at all. am i wrong about this??

They are only applying this update to those who complain about it, Not by default like the other updates.

They are only applying this update to those who complain about it, Not by default like the other updates.

but, why not be pro-active and download all the updates? updates are meant to fix problems. seems gm would do itself a big favor by having these updates downloaded when you bring the car in for service...even if you haven't bitched about anything.

btw, does anyone know if there is a "tranny hot overtemp light"? i'm too lazy to look it up in the manual...haha!

seems to me that a car like the g8 gt should always have the proper amount of tranny fluid when it begs to be driven hard! :)

but, why not be pro-active and download all the updates? updates are meant to fix problems. seems gm would do itself a big favor by having these updates downloaded when you bring the car in for service...even if you haven't bitched about anything.

Because maybe this update causes more stress on some components thereby lowering their reliability after all it does shift quicker/harder after the update. They wouldn't want to apply that to all the cars.

Also some that don't complain might like the way it shifts now because they drive like grandpa. After all it is a four door sedan and even though it has a big V8 that doesn't mean everyone who drives this car drives it like a race car.

I for one am happy they have fixed this it was my biggest complaint and I don't drive like a grandpa.

Just had #08-07-30-036 done today. Don't have a scanner so I'll do my best to copy the bulletin:

#08-07-30-036: Automatic Transmission Delayed Downshift,Lack of Acceleration, Flat Spot (Reprogram TCM)- (Aug 13,2008)
Subject: Automatic transmission delayed downshift,lack of acceleration,flat spot(reprogram TCM)
Models: 2008-2009 Pontiac G8 GT with automatic transmission(RPO MYC) built prior to VIN breakpoint 9L210304

Condition

Some customers may comment on delayed accceleration or lack of performance from automatic transmission when applying throttle at low speeds. This may also be described as a flat spotting or delayed shifting at approx. 30-40 km/h (18-25 mph).

Correction

A revised transmission calibration has been developed to address these issues.Reprogram the TCM with an update software calibration.This new calibration is available on TIS2WEB using the service programming system (SPS). As always, make sure your Tech2 is updated with the latest software version.

Hope this helps!

OMG, WTF, no dipstick to check ATF?! Geeze!

Just had #08-07-30-036 done today. Don't have a scanner so I'll do my best to copy the bulletin:

#08-07-30-036: Automatic Transmission Delayed Downshift,Lack of Acceleration, Flat Spot (Reprogram TCM)- (Aug 13,2008)
Subject: Automatic transmission delayed downshift,lack of acceleration,flat spot(reprogram TCM)
Models: 2008-2009 Pontiac G8 GT with automatic transmission(RPO MYC) built prior to VIN breakpoint 9L210304

Condition

Some customers may comment on delayed accceleration or lack of performance from automatic transmission when applying throttle at low speeds. This may also be described as a flat spotting or delayed shifting at approx. 30-40 km/h (18-25 mph).

Correction

A revised transmission calibration has been developed to address these issues.Reprogram the TCM with an update software calibration.This new calibration is available on TIS2WEB using the service programming system (SPS). As always, make sure your Tech2 is updated with the latest software version.

Hope this helps!

That's the one. Thanks Frank, you saved me the trouble of scanning and uploading mine. :wink2:

mac

Very loose and non of them tided the same to…
GM Specifications
Tighten (1)
Tighten the bolt to 25 N•m (18 lb ft).
Tighten (2)
Tighten the bolt to 12 N•m (106 lb in).
http://www.g8board.com/forums/attachment.php?attachmentid=1737&stc=1&d=1219868340

Thanks Dede

Just came back from the dealer did the ECM TCM update the car definitely runs much smother. and there is no more lagging
at full throttle. So hopefully this is a free fix.

Just came back from the dealer did the ECM TCM update the car definitely runs much smother. and there is no more lagging
at full throttle. So hopefully this is a free fix.

I have appt Friday. Was the update the one all are talking about? 08-07-30-036?

I am more concerned about the low fluid I have been reading about than the udate as the TCM tune is coming soon from VMS.

Thanks all for the input! Much thanks for the tech articles, why don't they have the shop manuals through helminc yet? :(

yes 08-07-30-036 this is the one i got done. i also asked the gye to check tranny flued, he sais it was full.

Because maybe this update causes more stress on some components thereby lowering their reliability after all it does shift quicker/harder after the update. They wouldn't want to apply that to all the cars.

Also some that don't complain might like the way it shifts now because they drive like grandpa. After all it is a four door sedan and even though it has a big V8 that doesn't mean everyone who drives this car drives it like a race car.

I for one am happy they have fixed this it was my biggest complaint and I don't drive like a grandpa.

no way, gm is not gonna issue an update that adversely affects components/parts. plus, my tranny doesn't shift any harder than it did before the updates...it just shifts like it actually has a clue now! to each his own...but imo updates should be automatic.

I just had the update done a few minutes ago. I work only a few miles away and really didn't notice a change. Not much of a test drive though. I'm looking forward to any improvement.

Unless there another update soon, my next step will be a full tune. The free updates from GM are nice until I can save up the $$$$ :).

I just had the update done a few minutes ago. I work only a few miles away and really didn't notice a change. Not much of a test drive though. I'm looking forward to any improvement.

Unless there another update soon, my next step will be a full tune. The free updates from GM are nice until I can save up the $$$$ :).

I noticed some people stated they noticed a big difference after the update. I noticed a bit of a difference, I think, but definately not a huge difference.

I noticed some people stated they noticed a big difference after the update. I noticed a bit of a difference, I think, but definately not a huge difference.

I just got this TSB today also. I do notice a difference but it's not a big one.

I noticed that when I'm already going 70 or so and floor it it drops down directly to 3rd now. Before it would briefly drop to 4th then 3rd. Also when I "stop" (maybe 1mph roll) at a stop sign and then lightly press the gas the delay that used to happen it noticeably reduced but not gone.

I'd say overall its an improvement, but for me not drastic.

I noticed some people stated they noticed a big difference after the update. I noticed a bit of a difference, I think, but definately not a huge difference.

those that are noticing the biggest difference are likely those that did not have 08150 installed before they got the latest TCM reflash. 08150 seemed to help some...and then the latest TCM reflash seems to have really helped with the hesitation issues...

I had mine done yesterday and was so excited that it was going to fix all these problems. I put on about 45 miles and I don't see any big improvement. I still does not shift right in low speeds. So I feel this did not really do anything to my car. Some People said its a night and day difference but if it was up to me i would say improvement by 10%.

I think Redhed may be right, people noticing big difference may not have had 8150 done. Where those noticing "no big change" probably already had that fix done, or had it from the factory. My car is scheduled to be done on Tuesday, so I'm hoping to see an improvement, but time will tell.

I took mine in today. Here is the paper work.

Too rainy to be able to tell the extent of the inprovement. Mine is an 888 car and has none of the updates so they did them all.

http://img.villagephotos.com/p/2002-11/65524/tran-fix.JPG

those that are noticing the biggest difference are likely those that did not have 08150 installed before they got the latest TCM reflash. 08150 seemed to help some...and then the latest TCM reflash seems to have really helped with the hesitation issues...

Hmm...good point. I've had 08150 done and I agree it helped a little. So 08-07-30-036 will help a little more, that is fine with me! I'll get mine sometime next month.

I noticed some people stated they noticed a big difference after the update. I noticed a bit of a difference, I think, but definately not a huge difference.
Had a chance today to really test the car. I am now noticing that the car is shifting more aggressively. It will chirp the tires between shifts where before it did not. I also believe the "it's lost in third gear " has disappeared.

Had a chance today to really test the car. I am now noticing that the car is shifting more aggressively. It will chirp the tires between shifts where before it did not. I also believe the "it's lost in third gear " has disappeared.

I had both updates done and still can't chirp the tires. Still working on it.:judge:

Looks like I'm still going to get a third party tune.

I had both updates done and still can't chirp the tires. Still working on it.:judge:
O.K. maybe the road had a bit of sand or dirt across it :>)) but there was a chirp from 1st to 2nd and 2nd to 3rd shift. Stability Control off of coarse.
Funny, during my have out experimenting a GTO decides he wants to play. As soon as he was ready I got a call and couln't play. Id been looking for one for weeks!:(:(:(

does anybody know the difference between this bulletin 08-07-30-036 and #08254? is one newer than the other, or does 08254 involve more updates...just wondering?

Ja, this lag sucks!

Had the 08-07-30-036 update done today. This is the only update since I bought the car (unless one was done in the two hours of DP). I noticed a big difference in how it shifts. The trans stays up with the engine now and even seems to anticipate which gear to be in. Glad you guys pointed this campaign out!
Before I had it done, talked to VMS, since I have the FXP on the way to flash the TCM. Was told to get the GM updates so they won't overwrite it in any future visits. I did, however, take out their "tuned" ECM and put the stocker in before the visit.

For my 2 pennies worth, get the update!

Now waiting for the ARH LT 1 3/4 headers. They will arrive Saturday!!!!!!!!!!!

Got the update done this morning and I did notice a difference when in SPORT mode. The transmission still does the delayed shift when in NORMAL mode, but the SPORT mode is much more responsive in a number of ways. As I pulled out of the dealership, from a roll (10mph or so) onto a 50mph road I laid into the throttle in SPORT mode. The transmission IMMEDIATELY shifted down into a much lower gear and launched out into traffic. The shifting delay was much shorter than before I took it in. Later, I did a similar WOT launch when in NORMAL mode and the delay was still there.

Also, when getting off the freeway and turning on to the bridge over the freeway I jumped on the throttle again (SPORT MODE) and it shifted quickly into 2nd gear and pulled hard. What was interesting was that, when I pulled off the throttle at 45mph or so the car HELD THE GEAR and kept the RPMs at a little over 4k for about 5 to 7 seconds, waiting for me to hit it again while in the power band. Before the update, it would have upshifted to around 5th or 6th and dropped the RPMs way back down and lagged if it hit it again.

I still need to play with it a little more, but if this is indicative of how it is going to work, with NORMAL being a lot more conservative and SPORT sticking a little higher revving, I will be very happy. For the record, I have an 09 that I took delivery of on July 29.

Got the update Friday and have driven the car quite a bit locally (ie, lots of gear changes.) I already had 08150 done.

The update made a noticeable difference on my car. Less throttle hesitation upon tip-in (but it's not by any means gone) and for whatever reason the car shifts harder - even in normal mode. It also appears the "dead spot" is gone. The best improvement? The car is more reluctant to shift into 2nd and 3rd when you are increasing the throttle position. Before this update, the car constantly upshifted/short-shifted - even when I was adding more throttle. It used to do this and seriously short shift - probably meant to help fuel mileage. Now, it seems like it's willing to hold the gear longer if I'm driving aggressively.

I'd say the transmission is now slightly better than liveable. I'm basically much happier now with the car.

I took mine in today. Here is the paper work.

Too rainy to be able to tell the extent of the inprovement. Mine is an 888 car and has none of the updates so they did them all.

http://img.villagephotos.com/p/2002-11/65524/tran-fix.JPG

For Job number 4 (which is the most recent update) I wonder why the notes says "Vehicle not involved in Bulletin at this Time"? None of the other updates have this language. Its almost like they are saying this update does not apply to this vehicle....

For Job number 4 (which is the most recent update) I wonder why the notes says "Vehicle not involved in Bulletin at this Time"? None of the other updates have this language. Its almost like they are saying this update does not apply to this vehicle....

That's exactly what they're saying. Bet they didn't do it.

Has anyone else noticed the occasional lurch when the car is shifting back to first as you come to a stop? If you are coming to a stop moderately quickly is the only time this has happened to me. It seems that the switch down to first gear might be happening when you are too close to completely stopped and if you are easing off the brake to make the final bit of your stop smooth it can lurch noticeably.

I also have noticed the lagging shifts / hesitation. I will be going into the dealer to get the update everyone has mentioned; I'll have to see if the shift to first when stopping is fixed too.

That's exactly what they're saying. Bet they didn't do it.

The line above "Vehicle not involved...." says "Updated transmission calibration". I watched them do it.

When the service writer looked up the bulliten he saw the "not involved..." but said it was only for cars that owners complained about the transmission shifting and hestitation. Unlike the other bullitens that effected all or certain VINs, this one was not to be automatically done unless the owner complained.

Has anyone else noticed the occasional lurch when the car is shifting back to first as you come to a stop?
I HATE THAT!
I just had the update done today,we will see.....It usaually happens in the morning when the tranny is warming up-I guess its EXTRA slow then

I HATE THAT!
I just had the update done today,we will see.....It usaually happens in the morning when the tranny is warming up-I guess its EXTRA slow then

I can confirm that this update fixes all the weird tranny quarks except the 6th gear whine.

You just have to complain about what you are experiencing.

Does the TCM/ECM update apply to 09's? It may be in here, but 8 pages is a lot...

The tranny is Still sluggish after ALL the updates, Sure it's improved but still slow shifting, slow to react, and a bit confused. GM will never make it slam into gear or drop to the best gear on kick down because then it would be considered too harsh for the general public. Lets not kid ourselves, this is a four door sedan and most owners will be using it to ferry kids etc around, not race it on a road course or at the drag strip.

If you want faster, harder, later shifts you have to get a third party tune period.

Has anyone else noticed the occasional lurch when the car is shifting back to first as you come to a stop? If you are coming to a stop moderately quickly is the only time this has happened to me. It seems that the switch down to first gear might be happening when you are too close to completely stopped and if you are easing off the brake to make the final bit of your stop smooth it can lurch noticeably.

I also have noticed the lagging shifts / hesitation. I will be going into the dealer to get the update everyone has mentioned; I'll have to see if the shift to first when stopping is fixed too.

When this happens I have noted that the RPMs are still up around 1000 instead of idle around 500. Haven't had it happen since the update.

no more "lurch" but it still feels like it needs time when almost coming to a stop and the tranny has to get from 4 or 3 to 1. ya know,like when you dont do that "full" stop at a stop sign and wait.its better,bu tnot completely cured.

i'm not wowed

I keep reading all these threads about the slow, hesitant or lurching transmission problems. I have never experienced any of these but I guess it would have to be because I had mine tuned by a speed shop with only 100 miles on the car. I now have almost 9000 miles and have made 2 trips from jacksonville fl to columbus ohio and have 0 complaints about the car at all. Like Norm 8332 said, the only way to cure this seems like a trip to a 3rd party tuner.

So is this tranny programming issue specifically with 08's or 09's? I just got a 2009 GT yesterday. I thought the GT upshifted O.K, but when you let off the trottle it seems like it takes a while for the tranny to settle.
I don't have any issue's with my 05 GTO, since it is a 6 speed!

Both, the 08s typically have 2 possible TCM updates available (if they weren't done prior to delivery) and the 09s usually have only one (again, if they weren't done prior to delivery). I got mine a little over a month ago and it needed the update and the difference was VERY noticeable to me. While it didn't completely fix the problem, it made it MUCH less obvious. Since you just got yours, the dealership may have already applied the update.

I've only had my 2009 GT for about 30 hours and this is my main complaint about it. I'm glad to see there is a calabration for it however. I have to go back to the dealer tomorrow so I'll have them take care of it then.

When this happens I have noted that the RPMs are still up around 1000 instead of idle around 500. Haven't had it happen since the update.

Interesting. I am glad to hear it might be fixed. Right now I have a Torrent as a loaner. No lurching. LOL!:whine: I hope it is better when I get it back. I also gave the dealer one last try at fixing the shake in the steering wheel at 45+ MPH. :drink:

Interesting. I am glad to hear it might be fixed. Right now I have a Torrent as a loaner. No lurching. LOL!:whine: I hope it is better when I get it back. I also gave the dealer one last try at fixing the shake in the steering wheel at 45+ MPH. :drink:
I hate the shake! I get it too.. What is it?

My car went in this morning for the tranny updates among other things. I will post my critique after I get the car back.

mac

My car went in this morning for the tranny updates among other things. I will post my critique after I get the car back.

mac

I asked the dealer for this but I had to re-ask when they said it was done; they said there was no update. I guess I might have to bug them to be sure / go to another dealer. Fun.:drink:

I hate the shake! I get it too.. What is it?

Are your tires balanced?

I asked the dealer for this but I had to re-ask when they said it was done; they said there was no update. I guess I might have to bug them to be sure / go to another dealer. Fun.:drink:

I have a buddy that is a tech at the dealership, and he printed it out for me and I gave it to the service guy when the car went in. I can assure you, it was done.:)
The 08150 is a TSB, the other one, you have to ask for. It may also bdepend on your VIN number.
Here is the text of the bulletin:
#08-07-30-036: Automatic Transmission Delayed Downshift,Lack of Acceleration, Flat Spot (Reprogram TCM)- (Aug 13,2008)
Subject: Automatic transmission delayed downshift,lack of acceleration,flat spot(reprogram TCM)
Models: 2008-2009 Pontiac G8 GT with automatic transmission(RPO MYC) built prior to VIN breakpoint 9L210304

mac

6G2EC57Y49L194122

Would that VIN be before or after the breakpoint?

6G2EC57Y49L194122

Would that VIN be before or after the breakpoint?

Yes

mac

I will post my critique after I get the car back.

mac

So, How's she drive?

There's a huge difference with mine.

So, How's she drive?

There's a huge difference with mine.

Don't know yet. I am waiting for them to deliver the car back to me.

mac

Don't know yet. I am waiting for them to deliver the car back to me.

mac

I hate waiting....:)

I hate waiting....:)

I don't mind as much since they do pick up and deliver the car for me when service is needed. :)
Besides, it gave me a chance to get my goat out of the garage today!

mac

Yes

mac

Yes? Yes what? That wasn't a yes or no question...

Yes? Yes what? That wasn't a yes or no question...

D'oh! Sorry. Yes, your VIN would be part of the update. It is before the breakpoint.

mac

Call or e-mail the other dealer in Mich., Vector Motor Sports and get your trans. problems solved.