Dodge Durango 2020 — technical service bulletin
Bulletin 21-021-20 · NHTSA communication 10175569 · issued Mar 20, 2020
Technical service bulletin
communication type
Power Train
component
2020
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may notice the following condition:A loud whistle noise upon engine start up. Rough and/or erratic shifting between gears during normal drive cycles.
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.