The contact owns a 2018 Ford F-150. The contact stated while driving approximately 5-70 MPH, the transmission was shifting hard. There were no warning lights illuminated. On a separate occasion, the transmission was shifted from drive to reverse and shifted very hard. The vehicle was taken to a dealer but not diagnosed, and the dealer was unable to duplicate the failure. The vehicle was not repaired. The local dealer was made aware of the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 22,500.