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Service bulletin TIB-16-033

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 id10040040
Published by NHTSA2011-08-12
Manufacturer's numberTIB-16-033
Manufacturer's date2011-08-05
NHTSA componentSUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:SHACKLE

NHTSA's summary

PACCAR: SHACKLE LINKS MAY HAVE BEEN MANUFACTURED INCORRECTLY AND HAVE PREMATURE CRACKING AND/OR A POSSIBLE BROKEN SHACKLE LINK. FAILURE OF ONE OR BOTH SHACKLE LINKS MAY RESULT IN THE VEHICLE PULLING TO ONE SIDE. *RM

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

Suspension

Vehicles listed
KENWORTH T4402011
KENWORTH T6602010 to 2011
KENWORTH T8002010 to 2011

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