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Service bulletin FSB 381-017

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 id10110381
Published by NHTSA2017-08-04
Manufacturer's numberFSB 381-017
Manufacturer's date2017-04-18
NHTSA componentPOWER TRAIN; POWER TRAIN:AXLE ASSEMBLY

NHTSA's summary

On Mack LR models with PDLO, Power Divider Lock Out, the alarm for this feature, while engaged, will only sound once and the volume may seem low. There will be a continuous pop-up in the instrument cluster while engaged. This is due to an instrument cluster SW issue.

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

Transmission and driveline, Axle

Vehicles listed
MACK LR

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