Violent banging/bouncing after hitting a bump

I have a 2001 Dodge Ram 2500 V10 with 55,000. It has a new transmission and the problem predates the transmission replacement. When I hit a bump from 40-75+MPH it bounces and bangs violently. The only way to fix it is to stop. It is more common at higher speeds. It is more prevalent to the driver's side bump, but not limited to it.

My mechanic suggested replacing the steering track arm and he guaranteed that it would fix the problem but it did not. To his credit he gave me all my money back but now no longer wants to work on my truck. It is not the cab or bed mounts. The truck has new ball joints and one new bearing since they broke one fixing the ball joints. It has also been aligned. The problem was occurring both before and after this work.

Could it be the shocks? I am not positive, but it could be the rear end that has the issue and not the front end. It is very hard to tell since the banging is so violent. It almost seems that the shocks are frozen and the truck bounces after it hits a bump just right on its leaf springs. Or it is almost like the wheels are going at two different speeds.