My friend, before you go ripping things apart because you think your rear main my be leaking, seriously look over the entire area. I also thought I had a rear main leaking and was told by many mopar finatics that it is unheard of any SB rear mains leaking. Well 1st off I found my sending unit had a small leak so I swapped it out with a new one and still had some oil dropping on the garage floor :banghead: so I wiped the oil pan down and started the car, crawled underneath and saw no oil coming out from the rear main. Shut it down and was looking at my oil pan and noticed a small drop of oil in one spot.. Hmmm I said.. Well come to find out I had a small pin hole in my pan and with 80# oil psi , well need say no more... For a quick fix I cleaned the area up, sanded it down and then put some good ole JB Underwater Weld on it, let it sit for a day, refilled with oil :prayer:and I have no more oil dropping's under my car. Good luck to you and hope it is not your rear main seal..