Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
511564
Service Bulletin/Repair Instructions
According to Ford's Final Notice of Recall 22V731: "In some of the affected vehicles, the rear stabilizer bar attachment bracket(s) weld-nuts may not be capable of supporting the required joint torque for this application and may have been damaged during the assembly process. During vehicle usage, the weld nuts attaching the rear stabilizer bracket may loosen, and the attachment bracket may break and/or the attachment bolts and the bracket may separate from the vehicle. It is possible that this may result in a road debris hazard."
511370
Service Bulletin/Repair Instructions
The rear axle may contain an inadequate volume of lubricating oil. An inadequate volume of rear axle lubricant may result in rear wheel bearing damage potentially leading to bearing seizure. Bearing seizure may lead to rear axle or driveshaft failure. A rear axle or driveshaft failure may result in loss of vehicle motive power, loss of transmission park function, and loss of parking brake function, increasing the risk of a crash.
831334
Service Bulletin/Repair Instructions
It was discovered that the manufacturing plant did not cut a stress relief line in the upper deck Driver Side and in on certain models, Passenger Side under the slide room(s). The upper deck in the Impression Fifth-Wheel needs to flex, without the "stress relief cut" the sidewall filon may crack under the slide room(s).