Allison Transmission, Inc. (ATI) is recalling certain Drive Units: H 50 EP (part numbers 29540673 and 29540900), H 40 EP (part numbers 29540697 and 29549708), H 50 EP Cert (part numbers 29556925 and 29556926), and H 40 EP Cert Drive (part numbers 29557038 and 29557036). The pressure switches on these Drive Units may fail, possibly resulting in a loss of drive.
A loss of drive can disable the vehicle unexpectedly, increasing the risk of a crash.
ATI will notify the manufacturers that purchased the affected equipment, and ATI dealers will replace the C1 and C2 pressure switches in the affected drive units free of charge. The recall began August 10, 2020. Owners may contact ATI customer service at 1-317-242-5000.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.