RAM 2500 2019–2020 — technical service bulletin
Bulletin S2121000009 · NHTSA communication 10230017 · issued May 4, 2021
Technical service bulletin
communication type
Power Train
component
2019–2020
model years
8
vehicle entries
Official summary
Rapid Shifts, High RPMs, 40-50 mph (65-80 kph) Max Speed, Inability to Perform Transmission Quick learn.
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.