I have no idea who, or when this was done on my 67 skylark, but as I was trying to re-install the axles after putting in the new posi unit, I found the axle retaining ring was rubbing against the wheel seals. The seals for this rear end are high centered, they center section of the seal protrudes up a bit in the center. When I took the old seals out, I made sure and noticed how these were installed. They were installed with the protrubance out towards the brakes, although the old seals were actually flat across the face. I believe that the nose was actually hammered flat on install of these which gave them clearance, however probably didn't do the seal any good. I assume this because I too, got a mallet and gave a couple good wacks and that nose just folded in to become a flat looking seal. I just figured oh well, different styles from different manufactures. http://www.superioraxlegear.com/images/NA8594-S%208594S%20seal.jpg This is a picture of the type seal. Notice the metal is stamped from one side and all pushed to the right of that picture. So I installed these the same way, with the "nose" part out. Install the axles, and the axle would not spin due to the retaining ring pushing against that nose. I asked a mechanic friend to look and he says, " the spring around the seal always goes inside, around the part you are trying to seal, you installed the seals backwards. " Sure enough, $30 later and pop in the seals the other way around and everything is torqued in and still spins. I guess that probably explains why there was a bit of oil contamination inside the drums when I disassembled the brakes. Anyway, if this helps one guy, then I have done a good deed for my day. Now to just get some time to re-mount this rear to the control arms and hang it.
