[prestige]

The sound is not from start up doing a self check, this is all the time, anytime, I want to hit a bump uneven. For example, back out my drive way when I hit the end of the driveway where it meets the road, clunk. The easiest way to explain this is the hitch receiver is clunking. That is exactly what it sounds like. Do me a favor go out a grab the back tire and shake the truck as hard as you can. Tell me you don;t have a clunk in the differential. It is loud. You will swear that the spare tire is loose. This did this on 3 trucks on the lot all new and I test 2 more here in another town. They all do it. Someone try it and tell me I am nuts.