Originally Posted by
SlowerOne
I understand what you are saying, but both races are thrust races! Both hold plastic ball cages, but one is attached to a gear, and one isn't! What's good for one thrust race is good for the other.
I have to disagree a bit. Normally what's good for a thrust bearing is a good grease like moly, wheel bearing grease, AE black grease, etc. These are not good lubes for the actual diff due to the torque being applied to it. This is not a normal operation for a thrust bearing so while a diff may be built just like a thrust bearing, it's operation is quite different. Greases will increase slippage which is not good on a diff and is why AE silicone is so good. A thrust bearing however, is not subjected to this torque that tries to slip it so a good grease (used sparingly) is perfectly fine for this.