2005 FORD F250 SUPER DUTY 4X4. VIOLENT SHAKING AFTER HITTING A SMALL DEFORMED PART OF THE ROAD, SLOW VEHICLE TO 10 MPH TO STOP THE SHAKING. HAVE LOST CONTROL OF THE VEHICLE 2 TIMES IN THE LAST WEEK. I HAVE TAKEN IT TO THE SHOP AND NO ONE COULD FIND ANYTHING WRONG WITH THE VEHICLE. *TR