1986 Chevrolet Pick-up Truck Differential Spool K30 - 4WD - Dana 60 - Standard Rotation - For Use w/40 Spline Axles - Steel - 4.56 Ratio And Up - Front guaranteed to replace your current 1986 Chevrolet Pick-up Truck Differential Spool K30 - 4WD - Dana 60 - Standard Rotation - For Use w/40 Spline Axles - Steel - 4.56 Ratio And Up - Front. 1986 Chevrolet Pick-up Truck Differential Spool comes new OEM 1986 Chevrolet Pick-up Truck Differential Spool aftermarket new 1986 Chevrolet Pick-up Truck Differential Spool of remanufactured 1986 Chevrolet Pick-up Truck Differential Spool K30 - 4WD - Dana 60 - Standard Rotation - For Use w/40 Spline Axles - Steel - 4.56 Ratio And Up - Front.