ALLISON TRANSMISSION, INC ALLISON TRANSMISSION, INC B3400 Recall
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
ALLISON TRANSMISSION, INC B3400
Brand
ALLISON TRANSMISSION, INC
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Allison Transmission, Inc. is recalling certain ALLISON TRANSMISSION, INC B3400 equipment due to power train:driveline:driveshaft issues. 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 tra.
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
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.
Reported concern (NHTSA)
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.
Recommended Action
Per NHTSA guidance
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.
Verify this information on the official source
For complete details and official instructions, check the National Highway Traffic Safety Administration (NHTSA) directly.
View official NHTSA recall noticePage updated: Jan 10, 2026