8.25 upgrade
There are 2 different carrier spline counts,, 27, and 29,(IIRC), you need the carrier to match your axles splines..
There was a year break,, hopefully someone will add when that yr was..
PS... the sure-grip carrier has to come from a 2.76 or numerically higher for use with 3:55s...
Oil,, there's lotsa opinion,, just be sure to ad a friction modifier for "sure-grips" or "posi".. to avoid chattering around corners..
hope it helps