Mine sounds like a golf ball is loose in a pocket between the cab and the bed. Removed everything from the bed, checked everything in the back, rode in the back seat, feels/sounds like from under the vehicle. Occasionally when the truck is tilted as in a banked curve I hear it (like a ball rolled to the side), but mostly over the bumps. Is this the same noise everyone else is hearing? I looked underneath, thought maybe because the skid plate over the gas tank wasn't secured in the front, could bounce, but after putting a rubber hose piece between, it made no difference, so that isn't it. Seems odd if really suspension or shocks?