I know what differential Oil (5,7,1) to use but what do I put on the Bevel gear (grease?) on the outside of the diff .. ? Also whats a good place to get differential oil?
thanx chris

I just use regular blue marine grease on those gears

Diff oil should be available at you local RC car hobby shop, otherwise any online RC car vendor has it too

Nitrohouse.com have good prices