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Service bulletin FSB 593-013

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 id10083060
Published by NHTSA2016-10-20
Manufacturer's numberFSB 593-013
Manufacturer's date2015-05-21
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

GRADE GRIPPER SOLENOID, REPLACEMENT. ON SOME MACK CHU, CXU, GU, AND TD TRUCK MODELS BUILT BETWEEN 04/31/2008 AND 05/11/2015, THE SOLENOID VALVE FOR THE GRADE GRIPPER FEATURE IS PRONE TO INTERNAL CONTAMINATION IN HARSH ENVIRONMENTS.

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, Automatic transmission

Vehicles listed
MACK CHU2009 to 2016
MACK CXU2009 to 2016
MACK GU2009 to 2016
MACK TD2009 to 2016

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