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Service bulletin IS355 Rev B

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 id10212226
Published by NHTSA2022-05-31
Manufacturer's numberIS355 Rev B
Manufacturer's date2022-02-24
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:FILTER/SCREEN

NHTSA's summary

Transmission Fluid and Filter Change Procedure

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, Automatic transmission

Vehicles listed
ALLISON 4000 SERIES TRANSMISSION
ALLISON TRANSMISSION

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