I made that mistake once - I used a moly fortified grease in the diff gear. Even when FULLY tightened down, the car wouldn't go anywhere. That stuff is slippery as hell.RC10th wrote: ↑Mon Apr 16, 2018 11:31 pm I'm not sure silicone paste is going to help you and lead to further frustration. The proper diff lubes aren't super slippery and actually allow the steel balls to bite into the rings. Too slippery of lube and they just slip and slide creating heat which damages everything in the long run.
As an example AE have two different silicone diff lubes, a standard silicone lube for pan cars (red writing), and their stealth lube (black writing) for everything else. If you use the standard/pan car silicone grease in any of the stealth diffs they will slip and destroy themselves.
I am pretty sure the two greases that AE uses - the clear and the black, are silicone grease and an additive lithium grease (likely with 3% moly). Since I switched back to silicone and got all the old stuff out of there, I haven't had a slipping issue, but I still have crunchy balls hehe. After researching here it makes sense that the diff balls are flat spotted from the slipping.