1984 Chevrolet Pick-up Truck Differential Carrier K30 - 4WD - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.10 and Down or Thick Gear Ratio's - Front guaranteed to replace your current 1984 Chevrolet Pick-up Truck Differential Carrier K30 - 4WD - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.10 and Down or Thick Gear Ratio's - Front. 1984 Chevrolet Pick-up Truck Differential Carrier comes new OEM 1984 Chevrolet Pick-up Truck Differential Carrier aftermarket new 1984 Chevrolet Pick-up Truck Differential Carrier of remanufactured 1984 Chevrolet Pick-up Truck Differential Carrier K30 - 4WD - Dana 60 - Yukon Grizzly Locker - 30 Spline - 4.10 and Down or Thick Gear Ratio's - Front.