The contact owns a 2015 Ford Expedition. The contact stated that while driving at an undisclosed speed and attempting to accelerate, the vehicle briefly hesitated, with the transmission slipping. Later, the contact stated that while driving at 60 MPH, the vehicle was vibrating excessively. The check engine warning light was illuminated. The vehicle was taken to the dealer and was diagnosed with transmission power converter failure resulting in damages to the timing chain. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 135,000.