WHILE DRIVING ON INTERSTATE 85 TRUCK STARTED MAKING NOISE AND COOLANT LIGHT CAME ON. AFTER OPENING HOOD NOTICE FAN DISLODGED AND COOLANT COMPLETELY GONE FROM RADIATOR. CALLED A REPAIR SHOP WHO DIAGNOSED THE FAN HUB BEARING HAD FAILED CAUSING THE FAN TO BREAK THEN CAUSING A CHAIN REACTION OF OTHER PARTS SUCH AS PENETRATING A HOLE IN RADIATOR AND POSSIBLY TURBO AIR TUBES AND OTHER MINOR HOSES AND BELTS AND REPLACEMENT OF FLUIDS TRANSMISSION AND COOLANT. THE TOTAL BILL ESCALATED TO ALMOST $7000.00 DOLLARS FOR WHICH IT SEEMED TO BE OVER BILLED BY THE REPAIR SHOP OF ABOUT 2000.00 DOLLARS. THIS COULD OF BEEN PREVENTED IF A SIMPLE DESIGN OF A BRACE TO HOLD FAN IN PLACE WHEN FAN HUB FAILS. *TR