Does any have have this problim ?

When I start up the car, I wait untill it gets completly warm .

then, I set my foot on the break + move the shifter from (P) to (D)

Once it get load I hear a Sound , not regular at all ...

even if I move the shifter fro (D) TO (R) ,, same sound.


One case I dont hear it..

If I move it from (P) TO (N) THEN TO (D) OR (R) ...



Hellllp please,, I think there is a problim with the Gearbox ...

Thanks ..

What kind of sound Saudi? Bang?

yup .. its like BANG ,, or like say " TEK TEK TEK DOG DOG DOG "

ya i got the same thing on my G8 hope its alright its done it since day one i assumed its normal

Same here, I get a single clunk into drive. Once warmed up, it doesn't happen.

I have the same noise on my '09 GXP. I read somewhere on this board about the ABS going through some sort of system check and causing the noise but I'm not sure if this is it or not.:dunno:

I was told the ABS check happens at 7 MPH, so you'd have to be moving for the noise to be that (mine does this, I get a single clack out of the front when I first pull away in the morning).

I do however, get a noise when I first put the vehicle into gear (either forward or reverse) with my foot on the brakes. The noise I get isn't a clunk, it sounds like someone swirling a marble around in a tin can, kind of like a deep metallic rumble if that makes sense. Once I get the car moving it goes away. Is this what your describing? I had the dealer look at it because it sounds like an exhaust vibration to me but they say everythings fine.

" TEK TEK TEK DOG DOG DOG "

This is the noise your brakes make while they are pumping the air out of the system. It happens about 5 min after I start mine up, every day :)

No noise here guys. Could it be the brakes making noise as the car moves a little?

YUP BUT THE EXACT EXPLINATION IS :

"" I do however, get a noise when I first put the vehicle into gear (either forward or reverse) with my foot on the brakes. The noise I get isn't a clunk, it sounds like someone swirling a marble around in a tin can, kind of like a deep metallic rumble if that makes sense.""


This is what i 100% have.


other thing, I still have that strange noise on rear right of the car whil warming the car .. but I dont car about it. I do care about the Gearbox ...




Regards to all ... :)

Interesting, so its not just me that noticed this sound. I asked the dealer to have a look while I had the car in for something else, since I thought it sounded like a loose heat shield or something. They couldn't find anything out of the ordinary, so I have no idea what causes it. I just heard it again tonight when I left work, only happens when I put it in gear right after a cold start.

I think it is ABS system pulsing. It doesn't sound like the typical GM systems (like my TBSS or SRX). I don't think it is anything to worry about.

It's ABS, 99% certain. The other noise could be fuel pump mounted in tank.

I believe its the Gearbox ..

Will tell the dealer next service ..

To Saudi and Proud - have you taken you G8 into the dealership yet? Would like to know more about this issue.

Normal, mine does it, another customer with a GT does it, and one on our lot does it. Goes away after good and warm as others have noted.

we drive cars made by GM....you should expect some noises :pir_flag:
hell,LSx engines sound like sewing machines but I love that sound ;)

Saudi. I heard what you are talking about today when I started my car. I have video of it I think. I'll try to edit it and post it so you can confirm it is the same noise. I have no idea what it is, but it ISN'T ABS... Only happens on my car when it is cold out.

I always back into my driveway so after driving home, I check the rearview and after seeing it's clear, I pull ahead and to the left at about a 45-degree angle. I then have the car completely stopped and shift into reverse, to back to the right and into my driveway. Everytime I stop and shift to reverse, I get a very mild but definite "clunk" that sounds like it's just below the shifter.

Does this sound anything like your noise?

I need to take the car to the dealer for a dead rearview mirror so I'll ask them about the clunk.

Ok I may be on to something, I put my car in gear today and noticed the marble in a tin can sound as usual so I thought I'd get out and investigate. I set the ebrake and left the car in gear so it would stay under load and continue making the noise. Just on a whim I put the toe of my foot on the driver side tailpipe and the noise went away. My best guess as to what causes this sound is that the exhaust is vibrating or touching something somewhere. When the exhaust system warms up it expands and must move away from whatever it is it vibrates on.

This would also explain why when I give the car a quick shot of throttle in neutral or park I get a metallic clank before the revs jump up, as the motor torques over the exhaust must be contacting something. I have a Magnaflow catback for the car which I will install once I get a couple issues sorted out, and I'll see if this solves the problem.

Just in case anyone is worried about this....it's normal.

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#99-04-20-002E: Information on Driveline Clunk Noise When Shifting Between PARK and DRIVE, PARK and REVERSE or DRIVE and REVERSE - (Jun 6, 2008)

Some owners of vehicles equipped with automatic transmissions may comment that the vehicle exhibits a clunk noise when shifting between Park and Drive, Park and Reverse, or Drive and Reverse. Similarly, owners of vehicles equipped with automatic or manual transmissions may comment that the vehicle exhibits a clunk noise while driving when the accelerator is quickly depressed and then released.
Whenever there are two or more gears interacting with one another, there must be a certain amount of clearance between those gears in order for the gears to operate properly. This clearance or freeplay (also known as lash) can translate into a clunk noise whenever the gear is loaded and unloaded quickly, or whenever the direction of rotation is reversed. The more gears you have in a system, the more freeplay the total system will have.
The clunk noise that owners sometimes hear may be the result of a buildup of freeplay (lash) between the components in the driveline.
For example, the potential for a driveline clunk would be greater in a 4-wheel drive or all-wheel drive vehicle than a 2-wheel drive vehicle. This is because in addition to the freeplay from the rear axle gears, the universal joints, and the transmission (common to both vehicles), the 4-wheel drive transfer case gears (and their associated clearances) add additional freeplay to the driveline.
In service, dealers are discouraged from attempting to repair driveline clunk conditions for the following reasons:
• Comments of driveline clunk are almost never the result of one individual component with excessive lash, but rather the result of the added affect of freeplay (or lash) present in all of the driveline components.
Because all of the components in the driveline have a certain amount of lash by design, changing driveline components may not result in a satisfactory lash reduction.
• While some owners may find the clunk noise objectionable, this will not adversely affect durability or performance.
• For additional diagnostic information, refer to the appropriate Service Information.

I took the car to the dealer, they said " GM SAYS, IT IS NORMAL" !!! ???

What the heck!!!!! ???

I still getting the sound, the service maneger get in the car with me, and I asked him

to pull the gear from (N) to ( D) and he heard the sound. 3 days later, he said "ITS NORMAL ...

The GM explanation of drivetrain freeplay and lash makes sense, but it is odd that it does not manifest consistently in the cars. I only get the clunk or thunk when shifting from drive to neutral (I do that at long stop lights). Otherwise, no noise at all in the drivetrain.

I always back into my driveway so after driving home, I check the rearview and after seeing it's clear, I pull ahead and to the left at about a 45-degree angle. I then have the car completely stopped and shift into reverse, to back to the right and into my driveway. Everytime I stop and shift to reverse, I get a very mild but definite "clunk" that sounds like it's just below the shifter.

Does this sound anything like your noise?

I need to take the car to the dealer for a dead rearview mirror so I'll ask them about the clunk.

Mine does it all the time. Just the clutch engaging into reverse, I assume.

I Usually get the dreaded clunk to when going from Park to Reverse or Drive. The TSB explanation makes sense. I can sleep again. :-)