I got the truck block up this weekend so I can work on it. Looking under it it looks just like you said mrfixit. Its leaking where the hub assemble mates up to the diff, I assume its leaking into the hub assy hence the brake issue. I'm guessing that its the those bearing support assy seals that are leaking?

I assume there is not a seal between the hub assemble and the diff because it should be dry in there. Is that a good assumption?

Another question I'm thinking about checking the wheel bearings and other seals so I'm looking to disassembling the whole thing instead of pulling out whole. Is there any problem doing it that way?

I don't have a good bench so it would be easier to remove piece by piece instead of removing whole then disassemble.

I took some pictures but I couldn't figure out how to display them. I don't know if the forum allows pictures.