NHTSA complaint #11766994

Owner complaint summary

While driving on a residential road, my 2019 Ford F-150 (10R80 10-speed automatic with 88k miles) lost power to the wheels – the engine revved but the truck would not move. It did not recover after I shifted to reverse, then park, then shut the engine off and restarted. The vehicle had to be towed. This followed an earlier event on or around July 7, 2026 (at ~86,500 miles) where the transmission failed to downshift from 4th gear at a stop and stalled the engine, recovering only after cycling the shifter. The truck has a history of hard shifting into and past 4th gear for over a year now. No warning lights appeared during these events. The safety risk is that the transmission intermittently loses drive engagement and can stall the vehicle in traffic. When the engine stalls, power brake assist is lost after one or two pedal applications. Had the loss of drive occurred in an intersection or on the highway rather than a low-speed residential road, it could have caused a collision. An authorized Ford dealer has twice been unable to duplicate the fault on test drives, consistent with the intermittent 10R80 CDF clutch cylinder hydraulic leak described in Ford TSB 25-2126. The dealer’s technician suspects an F-clutch concern.