Ford F-250 SD 2020 — technical service bulletin
Bulletin TSB 20-2043 · NHTSA communication 10171862 · issued Feb 13, 2020
Technical service bulletin
communication type
Power Train
component
2020
model years
4
vehicle entries
Official summary
Some 2020 F-Super Duty vehicles equipped with a 6.7L engine and 10R140 transmission and built on or before 15-Jan-2020 may exhibit harsh upshifts between 1st and 5th gears. This may be due to various strategies within the transmission control module (TCM) software. To correct the condition, follow the Service Procedure to reprogram the TCM.
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.