VEHICLE WAS DRIVEN AT APPROXIMATELY 20MPH AND UPPON DECELERATION THERE WAS A LOUD BANG AND ALL FOUR TIRES LOCKED UP AND HAVING NO CONTROL OVER MOVEMENT OF THE TRUCK. NO ERROR CODES FOUND AND DEALERSHIP STATES IT WAS A FAULTY TRANSFER CASE. VEHICLE HAS BEEN IN SHOP ALMOST A MONTH WILL NO RESOLUTION.