are you going to change out your u-joint as well? that will cause a vibration there if it has play. my pass. side was doing the same thing and it had a bad u-joint. ill tell yu... those u-joints were a PAIN to change on my truck, but if its got play it needs done. and that SHOULD take care of your vibration. even if THAT doesn't take care of the vibration, a u-joint with play needs changed anyway. you dont want it coming apart on yu on the freeway.