THE REAR DIFFERENTIAL LOCKED WHILE DRIVING AT 45MPH ON A STRAIGHT, FOUR LANE ROAD. IT MADE A LOUD THUMP AND FELT AS IF THE BRAKES WERE SLAMMED ON. THE CAR PULL HARD LEFT AND THE REAR TIRES WERE SMOKING. MANAGED TO GET THE CAR BACK TO THE RIGHT AND STOPPED AFTER HITTING THE CURB. FORTUNATELY NO OTHER VEHICLES WERE INVOLVED. THE ELSD IS ON BACKORDER AND WILL NOT BE AVAILABLE FOR 90 DAYS.