Service bulletin SF636
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 | 10201215 |
| Published by NHTSA | 2021-09-28 |
| Manufacturer's number | SF636 |
| Manufacturer's date | 2021-09-08 |
| NHTSA component | POWER TRAIN |
NHTSA's summary
Field Service Campaign for Western Star 49X Differential Lock - Parameter Update. Vehicles may automatically disengage the differential lock without warning when vehicle speed reaches 25 mph.
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
| WESTERN STAR 49X | 2021 to 2022 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.