Well finaly had time to look a little further into this. I jacked the truck up and checked the wheel assy for any play and luckily there was none. So i can safely say that the shafts and bearings seem to be in good shape. However when i spun the wheel around it did seem "lopsided" or "ovaled". I noticed that as the wheel slows down to a stop it will continue its momentum as if it is over ballanced heavily on one side. Sure enough i look inside the rim and there lay the original weights i used 4 years ago. So i am going to have them ballanced this weekend and see how they are. I hope that they haven't worn this way too bad as i need to save up monies for new tires.