The contact owns a 2016 Ford F-150. The contact stated that while driving 60 MPH, the transmission unexpectedly downshifted and the vehicle decelerated to approximately 15 MPH. The powertrain warning light was illuminated during the failure. Occasionally, the vehicle was coasted over to the side of the road, and the contact attempted to turn off the vehicle, but the vehicle occasionally remained running. The contact waited for several minutes before continuing to drive. During the failure, the occupants inside the vehicle lunged forward. The contact stated that a niece's head struck the windshield, leaving a bruise, and the contact’s partner lunged forward and struck her head on the side door handle bar, which left a bruise. The failure had occurred more than 25 times. The vehicle was taken to four certified mechanics, and the lead frame and all the sensors were replaced. The vehicle was taken to the dealer to be repaired under NHTSA Campaign Number: 26V237000 (Power Train). The dealer performed the update of the powertrain control module software; however, the failure persisted. The manufacturer was contacted and confirmed the VIN was no longer under recall. The failure mileage was approximately 31,000.