# Service bulletin TT7539EN Rev A

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: 10156690
- Published by NHTSA: 2019\-04\-08
- Manufacturer's number: TT7539EN Rev A
- Manufacturer's date: 2015\-06\-19
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

Tech Tip concerning program by Freightliner Custom Chassis Corp regarding 5th Generation Controls LoadBased Shift Scheduling \(LBSS\) Calibration Settings. The system will correct the calibration settings for this specific TCM

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10156690-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10156690-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories, Labels and manuals, Transmission and driveline, Automatic transmission

## Vehicles listed

- ALLISON 1000 SERIES TRANSMISSION
- ALLISON 2000 SERIES TRANSMISSION
- ALLISON 3000 SERIES TRANSMISSION

JSON: [/v1/bulletins/10156690](/v1/bulletins/10156690)

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