The contact owns a 2019 Ford F-150. The contact stated that while driving at various speeds, the vehicle had experienced harsh driving and harsh shifting between first and fifth gears. Additionally, the vehicle experiences sudden deceleration while shifting gears. The check engine warning light and the wrench symbol were illuminated, and the transmission temperature gauge was elevated to high. The vehicle was taken to the local dealer who reprogrammed the TCM, but the failure persisted. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 50.