Certain 2020 Model Year Super Duty F250-F600 Vehicles Equipped with a 10R140 Transmission

Bulletin number

21B03

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 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

Owners of these vehicles have filed 133 complaints in the transmission category.