---
title: "ALLISON TRANSMISSION 6TH GEN TCM - Recall 23E056000 — NHTSA record 251259 | Is It on Recall"
description: "Allison Transmission, Inc. (ATI) is recalling certain Emergency Vehicle Series 6th Generation Transmission Control Modules (TCM). The transmission control modul"
url: https://isitonrecall.com/recall/nhtsa-251259-allison-transmission-6th-gen-tcm-recall-23e056000/
updated: 2026-10-01
site: "Is It on Recall"
language: en
---

[Recall archive](https://isitonrecall.com/archives/) / NHTSA

# ALLISON TRANSMISSION 6TH GEN TCM - Recall 23E056000 — NHTSA record 251259

Published notice; closure not supplied

A campaign record does not say whether this individual vehicle has received the remedy. Check the VIN with NHTSA or the manufacturer.

Source date Jul 24, 2023. Retrieved Oct 1, 2026. Last updated Oct 1, 2026.

Archive changed Oct 1, 2026. USDA FSIS records are unavailable; [check FSIS directly](https://www.fsis.usda.gov/recalls). [Source coverage and dates](https://isitonrecall.com/sources/).

## What the record says

- **Product**: ALLISON TRANSMISSION 6TH GEN TCM - Recall 23E056000
- **Reason**: 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. 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.
- **Classification**: Not supplied
- **Recalling firm**: Allison Transmission, Inc.
- **Quantity**: 584
- **Agency-reported status**: Published safety recall
- **Source record identifier**: 251259

[Open the official record](https://api.nhtsa.gov/recalls/campaignNumber?campaignNumber=23E056000)

## Lot and product identifiers

| Label field | Details supplied by the agency |
| --- | --- |
| Lot, code or applicability | Product applicability: ALLISON TRANSMISSION 6TH GEN TCM. Check the model identifiers and, for a vehicle, the VIN on the official recall site. |

Match all identifying details in the current notice. A brand name alone is not enough.

## Distribution

Not supplied

No US distribution state could be established from this record. Check the official notice.

## Dates in the source

- **Report received**: Jul 24, 2023
- **Owner notification**: Jul 24, 2023
- **Record created**: Jul 25, 2023

FDA company pages use the listing date; enforcement records use initiation dates; CPSC uses recall date; NHTSA uses report-received date. These dates are not interchangeable.

## What to do next

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.

[Read the current instructions](https://api.nhtsa.gov/recalls/campaignNumber?campaignNumber=23E056000)

Use [NHTSA's VIN check](https://www.nhtsa.gov/recalls) to check an individual vehicle and its remedy status.

## Related records

[Vehicles records](https://isitonrecall.com/product/cars/) [Vehicles and equipment records](https://isitonrecall.com/category/vehicles/) [Allison Transmission, Inc. records](https://isitonrecall.com/brand/allison-transmission-inc/)