Axle seals

the "green" bearings are a sealed design, much like the ford 9", and they use seals. the seals are to keep oil from the bearing register area. even if you put a little grease on the bearing to seal the oil in the housing, you still could get leakage around the outside of the bearings. also, what happens when the grease you put on goes away? and when the bearings start to get a little wear?? leaks.

just run the seals.