[Blacdout96]

If a bearing went bad, you would know, believe me lol, there would most likely be a vibration and/or grinding noise coming from the rear. Thats a nice advantage having pressed in bearings compared to c clips in a performance aspect. I don't like having c clips, and one day im going to get an Eliminator kit.. Define "tightened them up", did you just hand tighten the lug nuts on? I did that before, its not enough, they need to be torqued properly to clamp the rotor to the axle correctly. Also, as the other person said, swap the rotors, see if it does it wobbles on the other side. If it continues to wobble on the one same side still, then it may be a drive train issue.