DT*: THE CONTACT STATED THE 2000 TOYOTA TUNDRA THAT WAS BOUGHT NEW HAD A TIRE PROBLEM. WHILE DRIVING ON THE HIGHWAY THE REAR DIFFERENTIAL LOCKED, THE CONTACT LOST CONTROL, AND THE VEHICLE CAUGHT ON FIRE. THERE WERE FIVE PEOPLE IN THE VEHICLE AND ALL OCCUPANTS WERE INJURED. THE DEALER INSPECTED THE VEHICLE, AND DETERMINED THE FAILURE WAS DUE TO A LACK OF OIL IN THE VEHICLE.*AK