Originally Posted by
BigRedXLT
Okay so every time I take the toll road to work, I put cruise control on at 73 or 74 mph. Once I hit around 75 and up my truck starts shaking like something is about to come loose. It also shakes whenever I let off on the accelerator, then stops when I give it more gas at the same speed. None of this happens driving around town. Just on the toll road. I just replaced two of the U Joints connected to my rear shaft about 5,000 miles ago. Any ideas on what this could be? Any suggestions would be great!