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Service bulletin TT8008EN Rev A

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10117314
Published by NHTSA2017-09-14
Manufacturer's numberTT8008EN Rev A
Manufacturer's date2017-06-02
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

NHTSA's summary

Advises services to reflash TCM if DTC P2789 is triggered.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

P2789

Vehicles listed
ALLISON 1000 SERIES TRANSMISSION

Listing a model year does not mean every vehicle of it is concerned: the document says which.