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Service bulletin 33-TR-16

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 id10082220
Published by NHTSA2016-10-13
Manufacturer's number33-TR-16
Manufacturer's date2016-07-21
NHTSA componentPOWER TRAIN

NHTSA's summary

TWO-PART ANNOUNCEMENT REGARDING THE RELEASE OF ENHANCEMENTS MADE TO THE A61, A62, A63, AND A65 5TH GENERATION CONTROLS TCMS AND THE RELEASE OF ADDITIONAL 5TH GENERATION CONTROLS FOR CHASSIS-MOUNT TCM TYPES CALLED A6A, A6B, AND A6C.

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.