A friend of mine here at Spangdahlem took his Jeep in for a thump noise when he turned. The Jeep dealership looked at everything and could not find anything wrong. The Jeep is completely stock and so he asked me to check it out and sure enough every time I turned there was a thump noise. Got under the Jeep could not find anything. So I opened the hood and sure enough the battery tie down was broke and was sliding back and forth. We got a new strap and no more thump.