WenmarOpen by Wenmar Pro

Service bulletin IS-297 Rev A

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 id10245708
Published by NHTSA2023-12-04
Manufacturer's numberIS-297 Rev A
Manufacturer's date2023-10-11
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT

NHTSA's summary

Process for fluid sampling

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 1000 SERIES TRANSMISSION
ALLISON 2000 SERIES TRANSMISSION
ALLISON 2400 SERIES TRANSMISSION
ALLISON 3000 SERIES TRANSMISSION
ALLISON 4000 SERIES TRANSMISSION
ALLISON 5000 SERIES TRANSMISSION
ALLISON 6000 SERIES TRANSMISSION
ALLISON 8000 SERIES TRANSMISSION
ALLISON 9000 SERIES TRANSMISSION
ALLISON TRANSMISSION

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