The contact owns a 2020 Ford Explorer. The contact stated that while driving at various highway speeds, the transmission experienced harsh downshifting from seventh to sixth gear. During the failure, the vehicle was shaking and vibrating abnormally, and decelerated unintendedly. The vehicle was taken to the local dealer who diagnosed the vehicle and determined that the transmission was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 35,000.