Steering Wheel Vibrate problems of the 2012 Ford F-350

When above 50 mph, if I happen to hit a bump or bumpy spot in the road, the truck starts to shake violently. The steering wheel vibrates so aggressively that it wants to pull you into the other lane or off the road. The front end of the truck literally feels like it's going to vibrate into pieces. Scares the heck out of me. 105k miles. Factory sized oem tires. Second set of tires on the truck. 80 psi. I replaced the steering stabilizer on the truck with a new one from Ford dealer. Still shakes uncontrollably.

Driving straight on a highway at 70 mph, hit a small bump on the driver side only. The steering wheel started shaking violently, the front end and quickly the entire truck felt as though it was shaking apart and was swinging back and forth, I slammed on the brakes and the shaking got worse until about 15 mph, it then stopped. I then got up to 60 mph and when I hit a bump the same thing happened. Then got up to 50 mph and the same thing happened. Then got up to 40 mph and it did not happen again at that speed. I drove 100 miles home at 40 mph on a main highway. Today I am bringing my truck to the dealership to have it fixed under warranty, I will do 40 mph all the way there. I will not tow my horses trailer with this vehicle, it would have caused an accident and killed my horses.