NHTSA Complaint #10969120 — 2011 FORD F-350

WHEN TRAVELING AT HIGHWAY SPEEDS WHILE TURNING SLIGHTLY LEFT AND HITTING ANY MODERATE BUMP IN THE ROAD THE TRUCK SHIMMYS VIOLENTLY AND DOES NOT STOP UNTIL SPEED IS REDUCED TO UNDER 20 MPH. WHILE THE SHIMMY IS OCCURRING STEERING CONTROL BECOMES NEARLY IMPOSSIBLE. THERE SEEMS TO BE AN UN-DAMPENED OSCILLATION OR SEVERE VIBRATION OF THE FRONT WHEELS. NOT SURE WHAT THE CAUSE IS. I'VE HAD THE FRONT END LOOKED AT AND BEEN TOLD EVERYTHING LOOKS TIGHT AND THE TIRE PRESSURE IS EVEN AND CORRECT. I HAVE ALSO PERSONALLY LIFTED THE TRUCK AND INSPECTED ALL THE STEERING COMPONENTS AND DO NOT SEE OBVIOUS PLAY IN ANY OF THE BALL JOINTS, TIE-ROD ENDS, SWAY BAR ETC. THE TRUCK ALSO HAS HAD NEW SHOCKS WITHIN THE PAST 200 MILES AND THAT DID NOT HELP. THIS PROBLEM HAS OCCURRED MORE THAN ONCE AND IS REPEATABLE GIVEN THE RIGHT CONDITIONS. I HAD PURCHASED THIS TRUCK APRIL 2016 AND DURING THE TEST DRIVE I COMPLAINED OF A VIBRATION. THE SERVICE PEOPLE TOOK NEARLY A MONTH TO FIGURE OUT A CAUSE. WHAT THE DID HELPED, BUT THE VIBRATION NEVER TRULY WENT AWAY. THIS SLIGHT STEADY VIBRATION SEEMS TO BE RELATED TO THE SEVER VIBRATION BECAUSE IT IS OF EXACTLY THE SAME FREQUENCY AND SPEEDS, JUST UNDER NORMAL CIRCUMSTANCES THE TRUCK IS VERY CONTROLLABLE.