99monguse

I had my 12 bolt installed about 3yrs ago maybe 4yrs and the car only has a couple thousand miles on it since...I would guess that I probably should have changed out the fluid by now, but what fluid should I use (and what additive)?

Its a MOSER 12 BOLT EATON POSI with 33spline axles with a T/A GIRDLE.

jimbo98z

iTrader: (3)

Since you're running an eaton posi, you should just continue to use whatever you used in the stock rear. Any good quality gear oil and the GM rear gear oil additive.