Adam2562

iTrader: (2)

ever since i've had my car... (feb 05 67k .. now, nov 20th 05 87k) i've had this thump feeling whenever i hit it hard from a stop... if i driveoff slowly it doesnt do it... yet when i pull of with some aggression or stomp on it.. i feel this thump in the rear.... does anyone have a similar issue with their GS... if so was it corrected and how? Thanks all for takin your time to read this..

JellyBean

Make sure your spare tire is really tightened down. JB.

Adam2562

iTrader: (2)

i've already checked that..... and everythingelse back there

aznxguy714

i never experienced this problem yet nor have i really looked in the area of the spare tire but could it possibly be the stock jack or the lug nut wrench kit that may be flopping around in there

Chpsk8

Does it feel like a U-joint in the driveshaft? Does it do it if you roll to a stop not using the brakes, then do a hard stop? (that might indicate a binding caliper)

Adam2562

iTrader: (2)

not caliper... but i'm gonna check my u joints.. i never thought bout that

JeffTsai

iTrader: (1)

Check to see if your mufflers are bolted down tight? Try to shake them around to see if you hear any metal to metal contact.

I have some noise issues on the back and I have an '05 with 6k miles!!!

Good luck on finding the problem!

PhantomZX

It sounds to me like something is loose in the trunk or possibly the muffler system as someone else suggested.

The reason I wouldn't think it's the U-Joints is that usually U-Joints would make noise when the driveshaft is changing directions or going from no-load to load or vice versa. When the car is in drive, the driveline is already "loaded" and putting pressure on the U-Joints.

Adam2562

iTrader: (2)

i've already checked mufflers.. spare tire.. spare tire tools.. it sounds like sumthing heavy sumthing big... its a hard deep thud.... i wish i could have u guys go for a ride n listen n feel it

P.S. thanx for the replys

PhantomZX

How about when you punch it and hear the thump while accelerating, then slam on the brakes (safely of course) - do you hear the same thump?

Adam2562

iTrader: (2)

no i only hear the thump when i hit it withenough force off the line from a stop

chuckb

could be the bushings on rear end are worn? I remember other threads about this.....

oohpapi44

iTrader: (1)

Now I've got the same damn 'thump' whenever I pull off, it sounds like the frame is split into two halves and they are knocking against each other at acceleration. Doesn't make the same sound when braking and will only occassionally do it over a VERY rough stretch of road but even then it's occassional. But the only way to not thump is to accelerate slowly (and yeah that's something I'm just real good at doing). It's only one thump and it sounds like it's coming from under the car in the center (driveshaft / u-joint?) More of an annoyance than anything else because it doesn't seem to have affected perfomance at all.

Insomnia

I have the same sound... don't know what it is or how to fix it

Adam2562

iTrader: (2)

i'm finally glad other people have the same problem... i'm juts confused as to wut it is... anyone have a solution that they may have resolved this previously????