gustaml

I think I'm going crazy, bought a 4.88 to slip in my EP 83 and it wont fit, its like the ring gear is about 1/4 to 1/2 inch too big. I have been using the stock 3.90 that came in the GSL swap I put in a few years ago and I think its an 83 also , but this new diff will not bolt up. its like it comes up 1/4" too big, three of us have been twisting and turning and that thing will not go in. Everything I read says the 1st gens are interchangeable. anyone else have this problem?

81WideMariah

iTrader: (8)

they're interchangeable, but the axles are bigger on 84 and 85.... make sure you don't have the diff upside down