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Service bulletin K31969523

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 id10173169
Published by NHTSA2020-04-02
Manufacturer's numberK31969523
Manufacturer's date2020-03-11
NHTSA componentEQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN

NHTSA's summary

AMT-F With Crawler Gears - During Gearbox Removal From The AMT: Input Shaft Slips Out Of The Gearbox Or Becomes Loose In The Gearbox

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

Equipment and accessories, Transmission and driveline

Vehicles listed
MACK MACK1999

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