WenmarOpen by Wenmar Pro

Other SIL 21-TR-26

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)
TypeOther
NHTSA id11037234
Published by NHTSA2026-09-09
Manufacturer's numberSIL 21-TR-26
Manufacturer's date2026-08-03
NHTSA componentPOWER TRAIN
Manufacturer's systemTransmission

NHTSA's summary

Service information for preparing, testing, and verifying to confirm transmission functions are restored following a complete overhaul

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 6000 SERIES TRANSMISSION

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