How does the outer pressed on tappered roller axle bearings next to the wheel hubs get lubricated ? Does it get lubricated from the differential from cornering ?

 

It gets lubed by gear oil even when travelling in a straight line.

 

That's what I thought, but I heard a grinding noise at my right rear end. Checked the disc pads...They were good..Pulled the axle and the roller bearings and race looked good, no pits or wear, just dry. So I checked my differential oil level and added about a pint before it started oozinng out the fill hole...Hope this solves it.