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April 9, 2021 Service bulletin

Certain 2017-2020 Model Year F-150 Equipped with a 3.5L GTDI Engine Powertrain Control Module Reprogram...

Ford technical service bulletin 21B10-S1 for 2017-2020 Ford F-150.

Bulletin number
21B10-S1
Component
Power train
Summary
Certain 2017-2020 Model Year F-150 Equipped with a 3.5L GTDI Engine Powertrain Control Module Reprogram for Cam Phaser Rattle Reports of Transmission Shudder after PCM Reprogram: Dealers are instructed to stop performing this field service action until further notice. This shudder is under investigation.

Owners of these vehicles have filed 2,690 complaints in the transmission category.

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