Chrysler 300 2014 — technical service bulletin
Bulletin 21-050-15 · NHTSA communication 10148977 · issued Aug 18, 2015
Technical service bulletin
communication type
Power Train
component
2014
model years
2
vehicle entries
Official summary
Flash: Transmission Shift Enhancements This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available for vehicles equipped with WA580 Automatic Transmission (Sales Code DGJ) and are broken down per engine application. 3.6L Engine (LD/LX) ? Erratic shifting or poor performance complaints while driving up steep hills, towing, driving aggressively, or at high altitude during hot ambient temperatures. ? Poor performance when driving aggressively. ? Poor pow
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.