Good Sunday Morning To All Of You Good Folk's, I am have a problem with the back part of my truck vibrating at 45 to 50 MPH. I have checked everything I can think of, D/S balanced, wheels and tire balanced twice, switch front tire to the back, I put new shocks on front and rear, all Bushings look fine. I don't know what is doing it be it has been doing it for over a year and it is no worst or better. I put the rear end up on jack stands and run it up through the 5 speed and nothing stood out. Anyone else had anything like this happen to them? Thanks