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Service bulletin TT7880EN

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 id10082269
Published by NHTSA2016-10-13
Manufacturer's numberTT7880EN
Manufacturer's date2016-07-27
NHTSA componentPOWER TRAIN

NHTSA's summary

INSTALLATION ISSUE COULD LEAD TO PROLONGED CONTACT OF AIR LINES WITH THE TCM OR TRANSMISSION WIRING HARNESS AND VEHICLES COULD EXPERIENCE UNEXPECTED DTC CODES.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline

Vehicles listed
ALLISON TRANSMISSION

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