# Service bulletin TT7491EN

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10156688
- Published by NHTSA: 2019\-04\-08
- Manufacturer's number: TT7491EN
- Manufacturer's date: 2014\-05\-13
- NHTSA component: ELECTRICAL SYSTEM; VISIBILITY; POWER TRAIN

## NHTSA's summary

Tech Tip concerning Transmission Harness Damage Due to Contact with Windshield Wiper Linkage and/or Unsecured Transmission Control Module \(TCM\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-10156688-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-10156688-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Glass, wipers and mirrors, Transmission and driveline

## Vehicles listed

- ALLISON 3000 SERIES TRANSMISSION
- ALLISON 4000 SERIES TRANSMISSION

JSON: [/v1/bulletins/10156688](/v1/bulletins/10156688)

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