Service bulletin TT-7539EN
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 | 10058997 |
| Published by NHTSA | 2016-01-09 |
| Manufacturer's number | TT-7539EN |
| Manufacturer's date | 2014-09-01 |
| NHTSA component | POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM:SOFTWARE |
NHTSA's summary
ALLISON TRANSMISSION: ON SOME TRUCKS CHASSIS, THE CALIBRATION SETTING FOR 5TH GENERATION CONTROLS LOAD BASED SHIFT SCHEDULING (LBSS) IS INCORRECT AND CAUSES POOR DRIVING PERFORMANCE. *PE
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
Electrical system, Transmission and driveline, Automatic transmission, Software, Transmission control module
| ALLISON TRANSMISSION |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.