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Service bulletin ST1099Rev X

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 id10203290
Published by NHTSA2021-11-08
Manufacturer's numberST1099Rev X
Manufacturer's date2021-09-08
NHTSA componentPOWER TRAIN

NHTSA's summary

Service tip notice related to transmission fluid and filter change recommendations

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

Vehicles listed
ALLISON 1000 SERIES TRANSMISSION
ALLISON 2000 SERIES TRANSMISSION
ALLISON 3000 SERIES TRANSMISSION
ALLISON 4000 SERIES TRANSMISSION
ALLISON B300
ALLISON H 40 EP TRANSMISSION
ALLISON H 50 EP TRANSMISSION
ALLISON T SERIES
ALLISON DIV ALLISON DIV

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