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Ford TSB #21B03-S1
2020 Ford F-450
TSB Document:
Affected Component: POWER TRAIN
- Summary
- Certain 2020 Model Year Super Duty F250-F600 Vehicles Equipped with a 10R140 Transmission - Number One Planetary and Ring Gear Assembly- Ref Cust Sat Program 21B03 dated March 3, 2021 In all of the affected vehicles, a distressed No. 1 planetary needle bearing inside the ring gear assembly will generate contamination that may produce rough shifts. A wrench light is likely to come on, and the transmission may go into safe mode and only operate in seventh gear. As damage progresses, the transmission may only be capable of limited vehicle speed or may not engage in forward or reverse
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