[Hamweld]

I’ve been collecting parts for a rear main job tranny fluid change, I’ve been keeping a close eye on the leaks, oil where the drain plug is oil around the rear main then I noticed I had it parked at an incline with the rear higher than the front had the rear jacked up to adjust rear brakes. I noticed what appeared to be tranny oil would this be normal. I know pumps are usually behind the torque converter are there seals that go bad and need to be replaced?