Ford will be contacting a small number of 2022 Ford Mustang Mach-E owners regarding a defect affecting the half-shaft in their cars. Some Mach-E vehicles may have been manufactured with a right rear half-shaft that could break under load.
Ford’s Critical Concern Review Group became aware that there was a problem in July 2022, when product engineering identified two vehicles with broken rear right half-shafts. One broken half-shaft was found during a squeak and rattle validation, and a second just before it was being loaded for transport.
Further investigation found that improper placement during the green turning in the lathe caused too much material to be removed, exceeding the specified minimum wall thickness of 9.1mm. Supplier records showed that inspection of the bottom wall thickness of the rear right half-shaft outer race had been suspended for a period of time which allowed non-compliant parts to pass inspection and be installed in finished rear right half-shaft assemblies. Ford’s team reviewed supplier maintenance records to determine the population of affected parts to have been produced between 07/18/2022 and 07/29/2022.
A broken half-shaft will result in loss of transmission torque to the rear wheels, necessary for motive power and for the transmission to hold the vehicle in park. If the electronic parking brake (EPB) is not manually applied, the loss of the primary park torque will allow the vehicle to roll with the transmission in park.
Owners receiving notifications will be instructed to take their vehicle to a Ford or Lincoln dealer. Dealers will photograph the label on the right rear half-shaft to confirm the suspect serial number(s). If the serial number matches, the dealer will replace the right rear half-shaft. Customers will be advised to manually apply the parking brake until the inspection and repair is completed. Ford’s number for this recall is 22S55 and the NHTSA campaign number is 22V-646.