2012 FORD F-550 Power Train Problems

TL* THE CONTACT OWNS A 2012 FORD F-550. WHILE THE CONTACT WAS HAULING SAND AND REGROUND GRAVEL UP A HILL, THE EMERGENCY BRAKE WAS ENGAGED AND THE GEAR SHIFTER WAS PLACED INTO PARK. THE ENGINE WAS RUNNING AND THE CONTACT EXITED THE VEHICLE. WHEN THE CONTACT RE-ENTERED THE VEHICLE, SHIFTED GEARS, AND RELEASED THE EMERGENCY BRAKE TO DRIVE, THE ENGINE STALLED. THE VEHICLE ROLLED DOWN THE HILL. THE CONTACT WAS ABLE TO STOP THE VEHICLE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO A DEALER. THE CONTACT STATED FAILURE OCCURRED TWICE JUNE 05,2019 AND SEPT.6, 2019. THERE WAS A FULL TANK OF FUEL IN THE VEHICLE. WHILE DRIVING UP A HILL HAULING SAND AND GRAVEL, THE CONTACT STOPPED ON THE HILL, RELEASED THE BRAKE PEDAL, DEPRESSED THE ACCELERATOR PEDAL, AND THE ENGINE STALLED WITHOUT WARNING. THE VEHICLE STARTED TO ROLL DOWN THE HILL IN REVERSE WITH...