Jeep Grand Cherokee 2014 — technical service bulletin
Bulletin 21-012-15 · NHTSA communication 10144905 · issued Feb 28, 2015
Technical service bulletin
communication type
Electrical System
component
2014
model years
1
vehicle entries
Official summary
Flash: Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. ? ECO mode will not retain settings. If ECO mode is turned off, it will turn back on after the ignition is cycled. ? 3-2, 2-1 Shift bump on deceleration. ? Less than desired shift quality during hard acceleration. ? Excessive shifts during cruise control operation. ? Intermittent delay shift condition. ? Less than desired engine braking during downhill descent. ? Manual gear selection improvements at higher altitudes. ? Less than desired driveabi
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.