Ford F-250 SD 2020–2022 — technical service bulletin
Bulletin TSB 26-2088 · NHTSA communication 11029923 · issued Mar 5, 2026
Technical service bulletin
communication type
Power Train
component
2020–2022
model years
12
vehicle entries
Official summary
This article supersedes TSB 24-2249 to update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt washers, and part number change of the fluid pan from the Parts List. Some of the vehicles listed in the Model statement above may exhibit a harsh reverse to drive engagements with no diagnostic trouble codes (DTC). This may be due to sticking valves in the main control valve body and/or damaged input shaft seals (F9), and the output shaft seals (F10). Additional model information: Built On Or Before 13-Dec-2021 10R140 Automatic Transm
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.