1968 GMC Pick-up Truck Differential Carrier K15/K1500 Pickup - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.56 And Up - w/ Full Float Axle - Rear guaranteed to replace your current 1968 GMC Pick-up Truck Differential Carrier K15/K1500 Pickup - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.56 And Up - w/ Full Float Axle - Rear. 1968 GMC Pick-up Truck Differential Carrier comes new OEM 1968 GMC Pick-up Truck Differential Carrier aftermarket new 1968 GMC Pick-up Truck Differential Carrier of remanufactured 1968 GMC Pick-up Truck Differential Carrier K15/K1500 Pickup - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.56 And Up - w/ Full Float Axle - Rear.