2022 Thor Motor Coach Challenger TSBs

These issues were caused by the use of drop hitches and hitch extensions that placed higher-than-expected forces on the hitch receiver assembly. If you use your motorhome to tow, please follow the recommended instructions in your owners manual. THE USE OF DROP HITCHES AND/OR HITCH EXTENSIONS WHILE TOWING WILL PLACE LARGER STRESSES ON THE HITCH AND CAN LEAD TO FAILURE. TMC is requesting that you inspect your motorhomes hitch receiver at your earliest convenience. Inspection instructions are enclosed with this letter. If you are unable or uncomfortable performing this inspection, contact your nearest TMC authorized dealer and they will inspect the trailer hitch for you. If any issues are found with your hitch or the mounting surfaces, please contact TMC Customer Service at 877-855-2867. TMC will coordinate and direct you to the nearest TMC authorized dealer for inspection and repair. The inspection and repair will be done at no expense to you.

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. This affects the following Thor Motor Coach products: model year 2021/2022 Ace, Challenger, Freedom Traveler, Hurricane, Miramar, Outlaw, and Windsport motorhomes