Jcrumpley

So we pulled the rear diff from my friends 2007 C6 non-Z51 coupe. The car has about 80k on it. We initially started to replace the output shaft seal due to a leak. When we drained the fluid we found big chunks of aluminum. What we found inside was that one of the posi unit bolts had backed out and caused carnage in the rear. The car was still operating perfectly though.

We are in desparate need for a complete 3.42 rear to put back in the car as this one appears beyond repair.

PM me if you have one.



https://utexas.box.com/s/rreyw711uffo1zdmfb2p

https://utexas.box.com/s/v8bi6q95cvld9fsc1kic

https://utexas.box.com/s/u0ctj7s0tefgx95odvo1

timd38

So, did you find root cause?

Jcrumpley

Yep, a bolt backed out, then contacted the case. We couldn't believe it didn't grenade itself. The car was running fine. It destroyed the inside of the case. I can only assume a manufacturing defect or improperly torqued bolt. The car has never been apart prior to this.

Bluewasp

Would a 2005 Z51 6 speed diff help? I have a feeling no because there are differences but just incase...

My zip code is 20112

timd38

Won't work for various reasons.