The contact owns a 2015 Ford F-150. The contact stated while driving at approximately 70 MPH, the vehicle shuddered and unexpectedly downshifted. The contact pulled over to the side of the road and waited for several minutes until the vehicle had returned to normal operation. The failure had occurred on several occasions. No warning lights were illuminated. The vehicle was taken to a dealer to be diagnosed. The dealer made the contact aware of an undisclosed recall however, the VIN was not included. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 120,000.