NHTSA Complaint #11461253 — 2015 FORD F-350

Over 5 times my truck become uncontrollable at highway speeds; 60mph or greater. A seam, groove, joint or other minor imperfection in the road instigates a violent shaking from the front of the truck. The only recourse is to jam on the brakes, at which the shaking subsides and control returns at approximately below 40 mph. As this normally happens at highway speeds, the loss and control and spontaneous braking required takes adjacent drivers by surprise very nearly causes an accident. I have owned this truck since it was new and purchase from Tommy Vaughn Ford. I regularly have the vehicle serviced at Hellman Ford in Stafford, TX. I've returned to Helfman 3 times since October 2019 with this problem. Initially they replaced some components which did not help, secondly I was told I needed new tires and that was the cause which I did purchase the next day which seemed to remedy the issue for 10,000 miles, and the most recent visit after the latest incident I was told they could not recreate the shaking, could not find anything wrong and no action was taken. I have not driven the truck in the two months since the last incident and is available for inspection if needed. Episodes do not result in any sort of warning light on the dash.