my rear diff is done, ive had the death whine for a while now in the rear, getting progressivly louder. I know it's the rear because I had the same problem about 40K miles ago with the T-case. I replaced that at 70K and car was running great until about 10-15K ago. I have 110K on the car now, bought it new. Funny thing is I have learned so much about these cars since owning and working on them. When my T-case went, I road it till the bitter end literally. It went to the point that the ring and pinion gear were sheared off completly(meaning no noise). At first is was a progressivly loudening whine, oil in T-case was like silver paint. changed it several times to try and prolong life, but it eventually went buy buy. Funny thing is, though, when it finally went, I figured i would still have a fwd car, right.....wrong, because the center differential without force from the rear, spins out of control under any load, like a slipt clutch. Anyway, long story short, my rear is going now and I want to find a good rear diff. any suggestions. Also are there kits to rebuild it, or is it like the front where if the ring and pinion goes, you have to scrap the whole thing.