The contact owns a 2013 Ford F-150. The contact stated that while driving approximately 65 MPH, the vehicle inadvertently downshifted to 3rd and then 1st gear, and the tires locked up. There were no warning lights illuminated. The vehicle was taken to the local dealer and the contact was informed that there were no fault codes retrieved. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure but no additional assistance was provided. The failure mileage was approximately 115,000.