1BAD_Z28

My axel housing gasket was leaking on my 2000 z28, so i replaced it and the guy at autozone recomended Lucas 80w 90 rear end oil. On the back of the bottle it stated that it was perfect for limited slip differentials and that no additive was needed. But now my rear is acting funny. when i get back tires spinning it seems as if my clutch is slipping but it isnt. When i did a burnout I noticed by the marks that halfway through the drivers side tire stopped spinng then started again. Is my rear end going bad or Is this occuring because i didnt use the limited slip additive. I have <100 miles on the car since the change. Any suggestions would be much appreciated.

Thanks,
Ryan

alamantia

iTrader: (10)

broken spider gears?

DVS99TRANS

iTrader: (7)

Sounds like the diff is going out, open it up and take a look at the gears in the diff. Look for any damage plus see how much metal is on the magnet on the cover.

SS SLP2

iTrader: (8)

try the GM additive only about 10.00, simple to try before going to a lot of work when it may fix problem , needed or not will depend on the diff you have.
good luck, Johnny

1BAD_Z28

When opened up the diff to change the gasket there was about a small amount of fine metal on the magnet. the biggest metal was about the size of eraser shavings. the rear has deveoped a whine. Which is only noticeable on the highway only due to my heads/cam/mac mids/randomtech catback. Oh and the car has the stock ten bolt with 3.42 gears w 100,000 miles on them.

DVS99TRANS

iTrader: (7)

My diff grenaded at 112,000 miles although I beat the **** out of it. Try the diff additive with the lucas like SS SLP2 said. Worse comes to worse and the gears look fine, you could just get a new diff for a decent price. Although I would just suffer through it and buy a stronger rear. Sorry, that seems to be the most common answer but it's true.