Service bulletin 403100556

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.

NHTSA's summary

According to the notification received by Daimler Trucks; certain vehicles may not have the correct programming in the transmission control module (TCM) to downshift to second gear during an engine brake event. This may result in reduced engine braking effectiveness. The TCM will be inspected and if necessary reprogrammed to enable the downshifting feature. The affected models are specific Freightliner Custom Chassis XCM, XCR, and XCS chassis manufactured March 21, 2016, through July 1, 2016.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

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

Electrical system, Transmission and driveline

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

• Bulletins for another vehicle
• Report an error on this page
• Report an error by email