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Service bulletin PB-321

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 id10052750
Published by NHTSA2013-09-11
Manufacturer's numberPB-321
Manufacturer's date2005-10-21
NHTSA componentSUSPENSION

NHTSA's summary

DEXTER: A RUNNING CHANGE WILL BE TO D90 SERIES AND D100HD-D150HD SERIES SPRING AXLE SUSPENSIONS. THE D90 SERIES WIDTH WILL BE CHANGED FROM 5.00" TO 4.00" AND PART NUMBERS AND OTHER ASSOCIATED ITEMS REMAIN THE SAME. THE D100HD-D150HD NEW SUSPENSION WILL NO LONGER REQUIRE LEFT OR RIGHT HAND EQUALIZER. NO MODEL OR MODEL YEARS LISTED. *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

Suspension

Vehicles listed
DEXTER AXLE CO DEXTER AXLE CO

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