Last night i put on some gloves and felt around on the underside to make sure no leaks and stuff of that sort cuz i kinda romped some [censored], made sure nothing was broken... on my rear diff (again.. casused me so many problems =P ) there was a like a little layer =? of oil Im guessing... it was black and oily... it wasnt leaking or anyting just some of that around the bottom. Is that normal or anthting to have a tiny bit be on the outside "seals" i guess youd call it? Thanks. 6in 87' K5 w/ 35" BFG muds. 305/Sm465/ NP208 Kn, 4.56's. In desperate need of a rebuild. Next- Eaton mech locker... Flows.