E:
sounds like the recipe for a super diff. But you are going to forget all that stuff soon... you wont be in there very often
I do run just a little dab of grease on my thrust, but I am sure that I am wasting that little dab. Lets just say it couldn't hurt.
The guys that run out doors need to be careful about collecting dust in their thrust bearings. If you take one wrap of masking around the delrin sleave that will cover the thrust bearing, it will act as a dust sheild. You should grease the thrust out doors.