I just put a 14 bolt rear end in my 1987 blazer. i put disk brakes on it, all new bearings in it, and also a set of 5.13 gears, its been on the road 2 days and one of the tires was covered in differential oil, i had 2 drive home, about a mile, and it was on the other then, and before i got back on the road the first time i put more fluid in, any ideas? i have alot of money in it to mess up like this

Just sounds like your hub seals are bad, pretty easy to do and will cost less than 10 bucks for the 2 seals

sounds like the only thing it could be is hub seals.
I have never had a problem with them though, I have even resued them!

I would just slap some RTV on there and see if that fixes the problem. Or you could go with the seals. I prefer RTV though.

yup, same thing on mine. seal... the cool thing about 14 bolts... parts is cheap...