BRAKE OR TRANSMISSION IS MALFUNCTIONING, TRUCK WAS PARKED ON A FLAT SURFACE IN THE DRIVEWAY AND NOT RUNNING, IN PARK, LOCKED AND AFTER A BOUT AN HOUR THE TRUCK BEGAN ROLLING, AN WAS STOPPED MY A PIECE OF WROUGHT IRON FENCE, DAMAGING THE FRONT BUMPER. IT COULD HAVE BEEN WORSE HAD THE FENCE NOT BEEN THERE. *TR