ALLISON TRANSMISSION ALLISON TRANSMISSION 6TH GEN TCM Recall
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
ALLISON TRANSMISSION 6TH GEN TCM
Brand
ALLISON TRANSMISSION
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Allison Transmission, Inc. is recalling certain ALLISON TRANSMISSION 6TH GEN TCM equipment due to power train:automatic transmission:control module (tcm/pcm/tecm) issues. Failure to achieve 4th gear lock up may prevent the vehicle from achieving the full sequence needed to pump water, which can increase the risk of inju.
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
Allison Transmission, Inc. (ATI) is recalling certain Emergency Vehicle Series 6th Generation Transmission Control Modules (TCM). The transmission control module (TCM) may fail to achieve the 4th gear transmission lockup needed to initiate the water pump.
Reported concern (NHTSA)
Failure to achieve 4th gear lock up may prevent the vehicle from achieving the full sequence needed to pump water, which can increase the risk of injury in an emergency.
Recommended Action
Per NHTSA guidance
Vehicle manufacturers will update the TCM software, free of charge. ATI notified the affected vehicle manufacturers on July 31, 2023. Owners may contact ATI customer service at 1-317-242-5000.
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