Well, I inspected the bearings. Spinning just the rotor/spindle, It spun very freely, and there was a 'tick, tick, tick, tick'. So I took off the spindle nut cotter pin, and i could literally take off the nut with my hand. It was very loose. So I replaced the inner bearing, outer bearing, and the inner wheel seal, and packed that baby full of grease. I torqued the spindle nut at ~35-45 lb/ft and put it all back together. I test drove it and the shake is gone!!! Also the truck doesn't pull to the right as much for some reason.
Will tightening the spindle nut at the specs above cause any problems?? I don't wanna burn up a brand new bearing. I know that the bearing has to break in before it gets that "free spinning" form.
But the conclusion is, case closed!