1972 Chevy Corvette rear end is making a noise like grindin

Tiny
JTJR
  • MEMBER
  • 1972 CHEVROLET CORVETTE
  • V8
  • 2WD
  • MANUAL
  • 17,000 MILES
I can't understand what is causing this problem? If I put pressue under the clutch to the rear end I am hearing a grinding noise. Only when it is uner a load, otherwise it runs fine witout any noise. I can shift and go through the gears without any problem, but if I try to pull a whole shot, which I have never done since I owned the car, I heqar that grinding noise. Since I bought the car I have never tried to pull a whole shot, so I am wondering if this was there all the time? I took the yokes of the rear end and the universal joints are fine. Everything looks good. I think there are bearings where the control arms go, but I am not sure how they are assembled or if there are any back there where the control arms are. Can you give me any clue as to what you might think it is?
Thursday, April 24th, 2008 AT 10:36 PM

3 Replies

Tiny
MOPARNUT1393
  • MEMBER
  • 34 POSTS
Ok so when the grinding starts is when you start to hot rod it?
I guess im not following what you are tryign to say.
If you have a grinding while its rolling and you are putting power to it you may have a bad bearing in the rear diff or maybe a bad ring and pinion gear or even a bad set of spider gears.
Unless the grinding is coming from the tranny and then you may have a bad counter shaft bearing, output shaft bearing, input shaft bearing, or maybe the clutch has lost some friction material and the rivits that hold the friction material on are grinding into the flywheel.
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Thursday, April 24th, 2008 AT 10:45 PM
Tiny
JTJR
  • MEMBER
  • 2 POSTS
Than you for your reply. I am not sure if what you said is the problem, but then I am not a mechanic. I do know that the only time I hear the noise, and its really not a grind. The only time it makes the noise is when I come of the clutch hard, and then it sounds like its coming from the rear end, possibly in the differential. Could it be the clutches inside? If so, would I be better off just replaceing the differential?Thank you for your previous reply, Jerry.
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Friday, April 25th, 2008 AT 11:54 AM
Tiny
MOPARNUT1393
  • MEMBER
  • 34 POSTS
Well id say maybe if you have a limited slip dif you should take the pan off the rear end and take a look
make shure every thing is in order and then refill the diff if you can not find any thing wrong. Look at the grease that comes out of the dif look for metal flake.
You will have some flake but if its like really full of flakes then you may take a closer look into the rear end.
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Friday, April 25th, 2008 AT 2:08 PM

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