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Service bulletin TIB-26-14

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 id10026728
Published by NHTSA2008-12-09
Manufacturer's numberTIB-26-14
Manufacturer's date2008-09-17
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION:LUBRICANT

NHTSA's summary

KENWORTH TRUCKS SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. CHASSIS' ORDERED WITH SYNTHETIC TRANSMISSION FLUID BUT MAY HAVE HAD NON SYNTHETIC FLUID INSTALLED AT THE KENWORTH FACTORY. CSC LETTER WAS RECEIVED. *PE

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, Manual transmission

Vehicles listed
KENWORTH T20002008
KENWORTH T6002008
KENWORTH T6602008
KENWORTH T8002008
KENWORTH W9002008

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