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Service bulletin 12-001

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 id11028169
Published by NHTSA2026-02-04
Manufacturer's number12-001
Manufacturer's date2026-01-08
Campaign id or software version12-001
NHTSA componentSUSPENSION

NHTSA's summary

Vehicles equipped with Watson & Chalin 20K AL2200 lift axles may have crossmember fasteners of incorrect grade.

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

Suspension

Vehicles listed
KENWORTH T8802026
KENWORTH W9902026

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