Ford F-350 2006 complaint. We have experienced violent shaking (shimmying) when the truck hits a bump on the highway and as a result, extreme difficulty maintaining the vehicle on the road. Our first experience was in August 2015, on the interstate highway while travelling at 75mp. We hit a bump and the truck / steering wheel shook violently for about 10 seconds causing us to swerve across lanes and struggle to keep the truck in the lane and out of traffic's way. We have since experienced this problem four more times hitting bumpy highways at speeds as low as 50mmp and as recent as 2 weeks ago. We have checked it out and our mechanic advised that he could not find anything wrong. It has been a great concern of ours as it puts our lives (and those on the road with us) at danger when this issue occurs. Additionally, every time the violent shaking occurs, it throws off the alignment and balancing for the truck. We have just received a letter from Ford advising of this problem and I have called the service center from the Ford dealer we bought the vehicle from. Ford is not assuming responsibility for any diagnosis or repairs to these defects at this time. Our tire pressure is in keeping with Ford's recommendations as they suggest in their letter. Ford F-350 trucks should not be approved for use on highways as this defect could result in fatal accidents if the shaking cannot be controlled. Also, Ford should be responsible for repairing the faulty trucks.

- Sandwich, MA, USA