September 22, 2021 Service bulletin

Low-speed downshift operation concern with automatic engine braking enabled

Ford technical service bulletin TSB 21-2314 for 2020-2021 Ford F-250 SD, 2020-2021 Ford F-350 SD and 2020-2021 Ford F-450 SD and others.

Bulletin number: TSB 21-2314
Component: Power train: automatic transmission
Summary: Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine may exhibit a low-speed downshift operation concern with automatic engine braking enabled. This may be due to the software in the transmission control module (TCM). To correct the condition, follow the Service Procedure to reprogram the TCM and powertrain control module (PCM).

Owners of these vehicles have filed 174 complaints in the transmission category.

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