Hi everybody, I'm planning on changing the fluids in both differential this weekend. (90 k1500 700r4, 5.7l). I am a bit confused as to what to put back in. The gear oil that I bought at autozone is 80-90 gl5. I am bothered by the small print on the bottle that says "for limited slip top off only". What kind of fluid should actually be in this truck? Am I correct in assuming it's the same in both differentials? tia, Chris
- posted
20 years ago