Dodge Durango 2020 — technical service bulletin
Bulletin 21-035-22 · NHTSA communication 10229814 · issued Dec 15, 2022
Technical service bulletin
communication type
Back Over Prevention
component
2020
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates The customer may describe one or more of the following: ? **A clunk or loud popping noise from the transmission (underneath) when the vehicle is started/ remote start.** ? A loud whistle noise upon engine start up. ? Rough and/or erratic shifting between gears during normal drive cycles. This bulletin involves reprogramming the TCM with the latest available software.
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.