anyone else have this issue? when i give it gas in reverse, the car starts shaking a lot and is very bumpy. it happened after my header install but im sure its just a coincidence.

i know this thread is an old thread but im having the same problem with my car. mine did it about 2 wks after i put my axlebacks on in sept. it only does it when the car has been sitting and its cold and it d.oesnt do it in P N D S nothing but reverse makes the noise and feels like someone is shaking my tranny. at first i thought it may have been an exhuast leak and the rpms were low so it needed more back pressure(if that even makes sense?) but i checked the rpms on the engineering mode and in R P D are all the same. neutral seems to be a lil higher rpm i think it was like 684? but im thinking i just have a tranny problem. im going to take my axle backs off today when i change the oil and see if that had anything to do with it.

anyone else with this problem? is it an easy fix or do i need the dusty dealer to keep my car for a few months to then tell me its normal!

Current mileage? If your under 100k without powertrain warranty voiding mods, take it to the dealership, it's under warranty. The dealership shouldn't have to keep your car while ordering parts, just for repair (1 day)

well when i had to get my lca's replaced they had my car for 3 wks than had the balls to try to charge me 25 a day for a loaner i need to goto a new dealer. but yes its under warranty i have 9800 miles on it. but it only does it while its been sitting so i would have to leave it over nite for them to check it out. i need a good dealer in NJ the one i got the car from sucks. i just wanted to see if anyone else had the problem and if its an easy fix or am i low on fluid or a solenoid? i guess ill have to make an app. they messed up my alignment too and my wheel isnt straight anymore so ill have to get that fixed as well