I WAS DRIVING ON US HIGHWAY 12 GOING APPROX. 35 MPH WHEN THE REAR END DIFFERENTIAL LOCKUP AND CAUSED ME TO SLID OFF THE ROAD IN A TURN THAT ALSO HAD ICE WHILE TOWING A FIFTH WHEEL THE ACCIDENT CAUSED DAMAGE TO THE RIGHT FRONT FENDER AND THE RIGHT REAR AND RIGHT SIDE OF THE 8 FOOT BED ALONG WITH THE WINDSHIELD AND A FRONT DRIVE LINE FOR 4 WHEEL DRIVE I HAVE HAD MULTIPLE ISSUES WITH THE FRONT DRIVE LINE BREAKING UNDER NORMAL CONDITIONS AS WELL I ALSO HAVE VIDEO OF THE REAR END DIFFERENTIAL MOVING FROM SIDE TO SIDE TO SHOW THE MOVEMENT AND SHOW WHAT CAUSED THE REAR END TO LOCK UP IT HAD MOVED AN 1/4 OF AND INCH TO 1/2 INCH IN EITHER DIRECTION.