Transmission may separate from driveshaft
Defect Summary
Allison transmission, inc. (ati) is recalling certain models b3400xfe_r and b400r, with part numbers b3400xfe_r and b400r. the transmission yoke may separate, resulting in driveshaft separation and a sudden loss of drive power.
Safety Consequence
A sudden loss of drive power can increase the risk of a crash. additionally, a disabled bus may require an evacuation procedure in an uncontrolled traffic situation, increasing the risk of injury to passengers.
Corrective Action
Dealers will inspect the output yoke bolts, and if necessary, tighten loose output yoke bolts, free of charge. owner notification letters were mailed december 9, 2023. owners may contact ati customer service at 1-317-242-5000. ati's number for this recall is 2023fa04.
Similar Recalls
Other recalls from Allison Transmission, Inc. or involving Power Train.
FAQ: Recall 23E079000
Your rights, the repair process, and what each field on this page means.
What is recall 23E079000?
NHTSA recall 23E079000 was issued by Allison Transmission, Inc. on October 11, 2023. It addresses: Transmission may separate from driveshaft. The recall affects approximately 8,498 vehicles, with the defect involving the Power Train component.
How do I get this recall repaired?
Contact any authorized Allison Transmission, Inc. dealer and reference NHTSA recall ID 23E079000 or the manufacturer campaign number 2023FA04. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.