Hello all, I have a 99 Silverado 1500 4x4. According the RPO codes I have
the G80 Locking Rear diff with the 3.73 gears. The blue tag on the diff
calls for 75w-90 Synthetic, so I bought the Mobil1 gear oil. I'm
wondering do I also need to add some sort of anti-slip additive?
Or is the G80 Locking differential different from limited slip
differentials that require a special additive?
BTW I intend to put the same in the front diff, but I've read here
something about a front vent that needs to be changed because it's made of
plastic. Is that true for the 99's and up? Seems bizarre to me that the
syn gear oil could ruin a plastic vent tube, the stuff comes in a plastic