sprint car diff Sept 20, 2012 17:07:56 GMT 10 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by RJMyers on Sept 20, 2012 17:07:56 GMT 10 Just wondering if the gears in the sprint car diff are nylon or self lubricating carbon, I just wanted to lubricate the three that's all.