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Service bulletin 2021FA08

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 id10208317
Published by NHTSA2022-02-28
Manufacturer's number2021FA08
Manufacturer's date2022-01-11
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Announces service campaign related to the torque converter lockup piston in certain dump trucks

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

Engine

Vehicles listed
ALLISON 4000 SERIES TRANSMISSION

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