find local shop at ATRA.COM. sounds like the transmission on the way out

IT COULD BE YOUR BEARINGS IN THE FRONT COULD BE YOUR TRANSMISSION OR TRANSFER CASE OR IT COULD EVEN BE IN THE REAR END AS IM NOT THERE TO PROPERLY DIAGNOSE THE TRUCK IT WOULD BE BEST TO TAKE IT TO YOUR MECHANIC

Transmission is slipping.

could be your parking brake dragging!!!