got them to open, thanks sue.

Kat, thats the seal at the front of the rear differential. Mine sprung a leak when the breather tube on the top of the differential got clogged. if you look on top of the round part of the differential you will see a rubber tube going straight up to the frame and then topped with a white cap. my cap was getting stuck and causing pressure build up in the differential, causing that seal to leak just like yours. i removed it all together and put a $10 "breather filter" from pepboys up there and have had no problems since