Front Suspension Control Arm problems of the 2017 Ford F-350

At approximately 8000 miles on the truck going down the interstate at 65mph towing an enclosed 20ft trailer I hit a bump in the road and the steering wheel began to shake violently. I had to get hard on the brakes to bring it back under control. I took the truck to the dealership, they were helpful and understanding. They replaced the steering stabilizer and checked the alignment. At 14000 miles same thing happened again except I didn't have a trailer in tow. Dealership replaced steering stabilizer with a newer model part per Ford recommendation. Most recently at 27000 miles it happened again while towing. Dealership replace control arm bushings and track bar. The truck still feels sloppy in the steering and I have no trust in it. I plan on selling the vehicle as I'm actually scared to drive it. It should be noted that in every instance the dealer was able to duplicate the condition with no trailer attached.