rear rumble/vibration (Long)
Thread Starter
Drifting
Joined: Jul 2004
Posts: 1,348
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From: MA
rear rumble/vibration (Long)
My car (1996 GS 24,000miles) has been in the garage for the winter and I put it on the road a month ago. I noticed a rumbling noise from the rear at speeds of 70 mph on up. It will be present even when the clutch is in or out at that speed. So the engine is not the problem.
I installed new tires as the old GSC's were at the wear strips. Installed 2- rear Goodyear GSD3 in the same size (315-35ZR17).
The vibration/rumble got a little better but it did not go away with the new tires. (So I guess it was not the tires).
The only thing I had a problem with was rear end noise on sharp turns last year. It had a different noise all together. At that time I drained the fluid (installed a drain plug as was shown in Corvette Fever article)and reinstalled GM fluid with one bottle of additive. It did not cure the noise. So a friend told me that the clutch packs were probably binding (sticking,glazed). He suggested to drain it again and run some ATF fluid in it and go to a parking lot drive in a figure 8.
It did fix the problem. I then drained the rear again and filled it with Mobil one synthetic gear lube with two bottle of posi additive. This solved the problem and the car was fine last year before I put it away for the winter. Any one have ideas (I was thinking of the wheel hubs/bearings but not sure how to check them). Sorry for the long post.
I installed new tires as the old GSC's were at the wear strips. Installed 2- rear Goodyear GSD3 in the same size (315-35ZR17).
The vibration/rumble got a little better but it did not go away with the new tires. (So I guess it was not the tires).
The only thing I had a problem with was rear end noise on sharp turns last year. It had a different noise all together. At that time I drained the fluid (installed a drain plug as was shown in Corvette Fever article)and reinstalled GM fluid with one bottle of additive. It did not cure the noise. So a friend told me that the clutch packs were probably binding (sticking,glazed). He suggested to drain it again and run some ATF fluid in it and go to a parking lot drive in a figure 8.
It did fix the problem. I then drained the rear again and filled it with Mobil one synthetic gear lube with two bottle of posi additive. This solved the problem and the car was fine last year before I put it away for the winter. Any one have ideas (I was thinking of the wheel hubs/bearings but not sure how to check them). Sorry for the long post.
