NHTSA recall 23E056000

Fire Truck Water Pump May Fail

Allison Transmission, Inc.Reported July 24, 2023Software

Vehicles affected: 584
Completion rate: 0%
Remedy: Dealer visit
Component: POWER TRAIN

Description

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.

Issue

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.

Consequence Summary

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.

Corrective Action

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.

Internal ID: 23E056000 · Updated October 22, 2026