RAM 3500 2020 — technical service bulletin
Bulletin 2100721 · NHTSA communication 10220614 · issued Feb 16, 2021
Technical service bulletin
communication type
Power Train
component
2020
model years
3
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may experience one or more of the following:Poor shift quality. Shift or gear hunting. The following software enhancement is also available: Stored faults can only be cleared by a diagnostic scan tool, this software will allow the TCM to self clear.
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.