Jeep Grand Cherokee 2014 — technical service bulletin
Bulletin 21-005-15 · NHTSA communication 10148611 · issued Jan 29, 2015
Technical service bulletin
communication type
Equipment
component
2014
model years
1
vehicle entries
Official summary
Flash: Transmission Shift And Drivability Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) and Transmission Control Module (TCM) with new software. NOTE: Both the PCM and TCM must be up to date for these changes to be effective. A small number of customers may experience one or more of the following conditions. ? Will not reach max speed (over 256 kph) during freeway driving. (International Market Only) ? Less than desired upshift quality in Normal or Sport mode ? Shift inhibit while transitioning in/out of MDS mode ? Less than desir
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.