[Rory McNeil]

Is this the style of axle bearing that uses an O ring around the OD of the bearing, where it goes into the axle tube? If so, I always put a smear of RTV sealer around the O ring, had no leaks. Since the axle bearings are sealed, there is no need for gear oil to get into the bearings. Most 9" car axle bearings are sealed ball bearing style, some of the F 100/150 PU truck 9"s have tapered roller bearings, which do rely on gear oil lubrication, those have axle seals on the outside of the bearings. Not normally used in drag race applications.