Rear Main Seal

Just so you know. Professional flat rate manual quote is 2.7 hrs for a /6, 4 hrs for a small blk. Anything over 5 is excessive without cause. So if you get a crazy quote, you may decide to do it yourself. good luck . cheers.

EDIT - Be absolutely sure it is the rear main, cuz after doing all the work to find the source is elsewhere is a piss-off. Gravity and the fan blow all the drips to the back of the pan. Clean the begeebeez outta it with brakclean to be very, very sure ! !