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Service bulletin 051

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 id10015151
Published by NHTSA2005-06-22
Manufacturer's number051
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:DIESEL

NHTSA's summary

DETROIT DIESEL MBE 926 ENGINES WITH ALLISON AUTOMATIC TRANSMISSIONS WILL REQUIRE THE PLD AND VEHICLE CONTROL UNITS TO BE REPROGRAMMED TO CURRENT MAINFRAME CALIBRATIONS TO IMPROVE VEHICLE ACCELERATION AND DRIVABILITY THAT COULD LEAD TO CUSTOMER DISSATISFACTION. DETROIT DIESEL MODIFICATION 05M-1. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
UNKNOWN UNKNOWN

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