The "logs" in the bearing ride directly on the axle shaft,instead of it having ball bearings with an inner & outer race--chances are both the axle shaft and the bearing rollers have wear,not just the bearing...you can avoid replacing the axle shaft by getting a "repair" bearing that has the rollers offset more,so they ride on an unworn portion of the axle shaft--most parts stores stock them...some guys dont like the idea of using a "wounded" axle shaft though,and prefer to replace it--Dorman now has aftermarket replacement axle shafts available thriugh parts stores that you cant always find used any more if you prefer to replace it..