NHTSA Complaint #10935989 — 2011 FORD F-250

WHEN HITTING UNEVEN PAYMENT AT HIGHWAY SPEEDS THE FRONT TIRES AND STEERING STARTS TO SHAKE. AS SPEED DECREASES, THE WOBBLE INCREASES TO THE POINT WHERE THE VIOLENT SHAKING WILL NOT STOP UNTIL ALMOST A COMPLETE STOP. I FOLLOWED THE NHTSA RECOMMENDATION OF 65 PSI AND OTHER PRESSURES AND IT HAS NO AFFECT ON THE WOBBLE. IMO I BELIEVE THAT AS THE TIRES WEAR DOWN, THEY HAVE LESS TRACTION ON THE ROAD SURFACE WHICH ALLOWS FOR THE OSCILLATION OF THE TIRES TO OCCUR. PUTTING ON NEW TIRES IS A BANDAID FOR A DEFECTIVE DESIGN. I HAVE HEARD THAT CHANGING THE POSITION OF THE AXLE (I BELIEVE CAMBER) CAN CORRECT THE PROBLEM. THIS CAN ONLY BE DONE WITH SHIMS. IN MY CASE, I NOTICED THAT THE SHAKING BECAME WORSE AS I SLOWED DOWN. THE NATURAL REACTION IS TO BRAKE WHEN THE WOBBLE BEGINS. I DECIDED THAT THE NEXT TIME IT OCCURRED, I WOULD SPEED UP. IT WORKS. THE WOBBLE CORRECTS ITSELF IN A FEW SECONDS AND IS NEVER NEAR AS SEVERE AS WHEN I SLOW DOWN. THIS IS A DANGEROUS CONDITION AND SHOULD BE LOOKED INTO DEEPER THAN HAS BEEN IN THE PAST. THIS HAS HAPPENED SEVERAL TIMES OVER THE PAST FEW YEARS. FORD, YOU KNOW ABOUT THIS PROBLEM.