So when I bought my car used, found out that it had a bad LSD that needed to be replaced and it had 3.73's. I bought new a new LSD and FRPP 3.73 to fix and try to get the whine away. I had them installed perfectly according to the shop i dealt with. The majority of the whine is gone but its about 40% still there. I have a weird feeling that it's not the rear end. Anything else it could be? Could it be my aluminum driveshaft? IDK