The contact owns a 2019 Ford Edge. The contact stated while driving at undisclosed speeds, the accelerator pedal was depressed; however, the vehicle hesitated and shuddered violently before accelerating. The contact stated that there were no warning lights illuminated. The contact had taken the vehicle to a local dealer and was advised that an anti-shudder additive was added to the transmission; however, the failure reoccurred. The contact stated that the failure also occurred after the vehicle was stopped and the accelerator pedal was depressed. The vehicle was taken back to the same dealer to be diagnosed, and the contact was informed that the transmission needed to be replaced. The vehicle was not 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 80,000.