Having a problem with vibration on my 02 Prerunner regular cab. I've had the tires(Goodyear) balanced twice and still have a bad vibration between 55 and 70 or so. I guess it could be one or more of the tires but they're probably only about half-worn. Can it be coming from misalignment or tie rod ends? Or is this common on all short bed regular cab Prerunners?