My Bounder is on a 2015 F15 Chassis, and I recently had it serviced and the dealer found that the bottom bolt on the u-clamp for the rear sway bar driver's side was missing. First they thought it was something that Fleetwood installed, but when I showed them the Ford logo on the u-clamp, that changed that tune. They also thought that the bolt is welded on to the housing under the shock absorber, which also turned out not to be true. Evidentially they do a tack weld on the nut to keep it in place to secure the u-clamp as the housing prevents the nut from being secured using a wrench when installing the bolt through the clamp. They also used Lock-Tite. Anyway, there is a five year warranty on this chassis, so they replaced the clamp and bolt at no charge. Don't know where you are, but the clamp and bolt was readily available that day in Boyertown, PA. I went on the Bounder Forum to see if anyone else had this was a problem and got no response. Getting ready for a month or so trip, so will be keeping an eye on it. Is there a Ford F-53 Forum? Following are the part numbers for the sway bar items that were replaced. Don't know if they are the dealer part number or Ford. 1C3Z*54868AA - BRACKET; 9U9Z*5493*A - INSULATOR ASY (BUSHING); N605815*8439 - BOLT; W703214*S309 - BOLT - HEX HEAD; W703217*S440 - NUT. Hope this info helps.