The contact owns a 2013 Ford F-150. The contact stated that while driving 30-35 MPH, the check engine warning light illuminated, and the vehicle started to jerk. The contact stated that the transmission downshifted to second gear. The failure became more persistent over time. The contact stated that the failure was related to NHTSA Campaign Number: 19V433000 (Power Train). The vehicle was taken to an independent mechanic, where it was determined that the output speed sensor circuit needed to be replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and opened a case, but no assistance was provided. The failure mileage was approximately 140,000.