While traveling at 40 mph the car suddenly shifted into first gear. At that time the speedometer, trip odometer, and gas mileage indicator all quit working and the service wrench appeared on the reader. The rear tires locked up sending the car into a skid that took the vehicle into the on coming lane luckily not resulting in an accident thanks to the quick reaction of the driver occupying that line. The car was pulled over and shutdown and the system went into limp mode on start up. After taking it to an independent mechanic I was informed that the code P0720 indicating a fault in the Output Speed Sensor, popped when hooked up to computer by the head mechanic. They directed me to Ford as their is a current recall on this model of transmission for 2014 Ford F-150s and 2013 Ford Expeditions and that I should submit an incident to the NHTSA so they are aware that this issue is present in more vehicles with the 6R80 transmission than those currently on the Ford recall.