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Service bulletin TSB-26-006-WST

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 id11028075
Published by NHTSA2026-02-03
Manufacturer's numberTSB-26-006-WST
Manufacturer's date2026-01-30
NHTSA componentPOWER TRAIN

NHTSA's summary

Technical Service Bulletin for DT12 Excessive Wear

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

Vehicles listed
WESTERN STAR 47X2022 to 2026
WESTERN STAR 49X2021 to 2026

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