Service bulletin 18TR21
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10205139 |
| Published by NHTSA | 2021-12-20 |
| Manufacturer's number | 18TR21 |
| Manufacturer's date | 2021-11-12 |
| NHTSA component | EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; POWER TRAIN |
NHTSA's summary
Service information announcing that the standard duty retarder rotor will be replaced by the heavy duty retarder rotor.
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, Transmission and driveline
| ALLISON TRANSMISSION |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.