WenmarOpen by Wenmar Pro

Service bulletin SIL 06-WT-04 Rev

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 id10212228
Published by NHTSA2022-05-31
Manufacturer's numberSIL 06-WT-04 Rev
Manufacturer's date2022-02-28
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

Announces the release of several new re-trans products, including interchangeability

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.