PROBLEM WITH FRONT AND REAR DIFFERENTIAL REPORTED TO DEALERSHIP. THEY DID NOTHING TO FIX, JUST RESET CHECK ENGINE LIGHT. 3 WEEKS LATER CAR WAS IN A ROLLOVER ACCIDENT. DRIVER STEERED SLIGHTLY TO AVOID COLLISION WITH ANOTHER VEHICLE THAT WAS MAKING AN ILLEGAL LANE CHANGE AND MONTERO WENT OUT OF CONTROL. NEITHER STEERING NOR BRAKING COULD STOP OR AFFECT WHAT WAS HAPPENING.