Dodge Challenger 2014 — technical service bulletin
Bulletin 21-029-15 · NHTSA communication 10148899 · issued May 5, 2015
Technical service bulletin
communication type
Power Train
component
2014
model years
1
vehicle entries
Official summary
Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one or more of the following conditions. Less than desired shift response during heavy load or aggressive driving in high ambient temperatures. Bump sensation felt while downshifting during coasting deceleration or normal braking (5.7L and 6.4L applications only). Less than desired fuel economy.
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.