Steering Tie Rod Assembly problems of the 2012 Ford F-350

I recently crossed a bridge expansion joint doing somewhere between 70 and 75 mph my truck steering wheel shook violently as I could barely hold it. I slowed down to about 40-45 mph before it quit. This was on a Saturday. Monday I took it to a local garage to have the tires rotated and balanced and check for anything that could be bad in the steering/front end suspension. They rotated the tires and found the steering stabilizer shock was leaking, they replaced it and started to bring me the truck. It started shaking violently at 50 mph. They ended up replacing the drag link, right outer tie rod end, adjusting sleeve, ball joint at tracker bar and right outer lower tie rod end. They said I needed to get an alignment on it, I drove the truck a couple hundred miles seemed to be fine. I took to the shop they used for a alignment, they did their thing and I left. When I left I noticed the steering wheel wasn't straight so I took it for a quick drive. At 60 mph I did the violent shaking again and having to slow down to 45 mph for it to stop, it shook twice in a 6 mile stretch of interstate. I returned it to the alignment shop and they said they could not have done anything to cause it. . I took it back to the first shop and they got it in the Ford garage for an alignment. Still shaking after they had it for most of a week they replaced the tires and it seemed to help. Until a couple days later I was running 62-64mph in a slight turn and it started doing it again. It is still doing it and I know when it is going to start so I'm ready. After research on the web I hear that this is called the "death wobble".