Ford F-250 SD 2020 — technical service bulletin
Bulletin 21B03 S5 · NHTSA communication 10222456 · issued Mar 31, 2022
Technical service bulletin
communication type
Power Train
component
2020
model years
5
vehicle entries
Official summary
Certain 2020 Model Year Super Duty F250-F600 Vehicles Equipped with a 10R140 Transmission - Number One Planetary and Ring Gear Assembly Submitting Owner Letter
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.