The contact owns a 2019 Ford Expedition. The contact stated while driving 55 MPH, the transmission unexpectedly downshifted. In addition, there was an unknown warning light illuminated, with a message to Contact the Dealer displayed. The vehicle was taken to the dealer, and the previous learning strategy was erased and deleted from the computer system. The vehicle was then taken to an independent mechanic, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 106,000.