WenmarOpen by Wenmar Pro

Service bulletin IS355

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 id10156732
Published by NHTSA2019-04-08
Manufacturer's numberIS355
Manufacturer's date2016-04-27
NHTSA componentPOWER TRAIN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

NHTSA's summary

Instruction Sheet regarding 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

Equipment and accessories, Labels and manuals, Transmission and driveline

Vehicles listed
ALLISON 3000 SERIES TRANSMISSION
ALLISON 4000 SERIES TRANSMISSION

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