I just got a new truck and when I'm going down the road at 65 there is a strang ratleing vibration onder the driver floor board. I checked the bearing, the break pad and roater, the tires have all been replaced and balaced twice I check the u joints on both the drive shaft and axle pulled the manule hub apart and nothing is wrong with any of it I just can figure it out. Some one please help. O the truck is a 95 f150 ext cab and the auto locking hubs have been swithched fo manuel ones