Thread: IRS Grinding ?
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Old 05-31-2013, 01:19 PM
gt40gordy gt40gordy is offline
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Default IRS Grinding

So I finally got the car back to the shop and we tore into it to find the source of the strange rearend noise.

Opened the diff and everything looked good, added the recommended two tubes of GM additive and topped off with 80/90.

Disassembled the axles, all CV's good and then had a chance to check wheel bearings. A definite grinding sound was coming from the driver's side (hard to tell when running) , pass side okay. Bearing replaced and car reassembled.

First test drive seemed to confirm that the problems (fingers crossed) are solved. I am still not happy with the brakes, Wilwood front/Jag rear, as it seems like the current pads are mega hard and the car is not stopping as it should.

Unfortunately the pads are obsolete, according to Wilwood, as we were going to swap them out for something not quite so aggressive. May have to change out the calipers but at least it looks like the grinding issue is solved.

Thanks everyone for the suggestions and support.
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