PIP4642: Drive Line Boom Noise And/Or Vibration

[99-LS1-SS]

OK so, i was at the dealership this morning for a noise that i cant identify. The noise started after i went to the drag strip(lots of wheel hop and unexperienced driving). its a moaning(cats meow), high frequency spinning noise, thats most apparent on decel. but i can sometimes hear it outside of decel also. its most apparent above 40 mph. it spinning sound slows down as the rpms drop. I am worried i f-ed something up at the strip, since it only has 4,500 miles on it, and i wasnt exactly nice to it, lots of bad wheel hop, the back of the ARH came off the hook.

What is strange is that i my car used to shake when it was new, and that went away, and there is no shaking anymore, but when the noise is happeneing, if you reach and touch the shifter lever, it feels like gears are grinding.

I talked to a friend who knows more than me, and he said i might have fucked up the gears, and to try and be nice to it for a while, and change the fluid. well, i took in today to see what their diagnosis would be. they(the service manager) claim that the noise is a regular driveline noise, and theres nothing they could do. i said its def not normal, the sound gives me headache. they said they checked the bulletins and theres nothing. i said i know theres one, he said dont believe half the crap you read online, i said can you change the fluid? they said no way, cant do that, we really cant do anything for you, and proceeded to tell me how awesome the car is. i left there with even more hatred for GM dealerships then before i went it, which was already very high.

FYI, this dealship is Callerimi in Budd Lake, NJ. They are terrible. Stay away from them.

Anyway, my GXP is hurting, and idk what to do...

I agree with your friends assessment. It sounds like you screwed up your rear gear and it's "masking" the drive line vibration.

[-Ray-]

One of our members broke the carrier bearing during violent wheel hop.

[99-LS1-SS]

The GXPs SUCK when it comes to wheel hop. My Cobra was as smooth as silk compared to the GXP. When I get my car back I WILL be putting the diff bushing in.

[mtolivecracker]

One of our members broke the carrier bearing during violent wheel hop.

it has whizzing/twirling bad bearing type sound. do you think that could be it? or gears? is there any diagnosis i can atttempt? not afraid to rip the car apart

[99-LS1-SS]

Get the car on jack stands and see if you can spin the tires by hand and try to notice where the noise is coming from. You'll need to make sure the car is SAFELY on jack stands and in neutral. Try to see if you can wiggle the driveshaft at the carrier bearing. It shouldn't any noticeable movement.

[mtolivecracker]

Get the car on jack stands and see if you can spin the tires by hand and try to notice where the noise is coming from. You'll need to make sure the car is SAFELY on jack stands and in neutral. Try to see if you can wiggle the driveshaft at the carrier bearing. It shouldn't any noticeable movement.

I will try that, i usually dont hear it at low speeds, but then again, the car wont be running when its up so i might hear something. wish i had a dyno in my garage.

[amparoorman]

We bought our G8 GT in June and noticed this vibration at less then 1,000 miles. They tried all of the bulletin suggestions, but nothing helped. Told us we would just have to wait until Detroit came up with a fix. We suggested they replace the whole drive shaft, but they just looked at us! Love the G8 except for this problem. It is at its worst between 55 and 65 (where we are most of the time on the highway)

[dogcat]

Did you ever find a solution to this problem? Mine has a whining sound from 60-70 MPH

[GRRRR8]

Did you ever find a solution to this problem? Mine has a whining sound from 60-70 MPH

His driveshaft was replaced.

[-Ray-]

Did you ever find a solution to this problem? Mine has a whining sound from 60-70 MPH

The whining is a weight placed on the transmission. One of the very 1st tsb's.