1972 GMC Pick-up Truck Ring and Pinion Set K25/K2500 Pickup - Dana 44 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - 26 Spline Pinion - Fits 4 Series Carrierr - Double Drilled Ring Gear for 3/8in. and 7/16in. Bolts - Front guaranteed to replace your current 1972 GMC Pick-up Truck Ring and Pinion Set K25/K2500 Pickup - Dana 44 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - 26 Spline Pinion - Fits 4 Series Carrierr - Double Drilled Ring Gear for 3/8in. and 7/16in. Bolts - Front. 1972 GMC Pick-up Truck Ring and Pinion Set comes new OEM 1972 GMC Pick-up Truck Ring and Pinion Set aftermarket new 1972 GMC Pick-up Truck Ring and Pinion Set of remanufactured 1972 GMC Pick-up Truck Ring and Pinion Set K25/K2500 Pickup - Dana 44 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - 26 Spline Pinion - Fits 4 Series Carrierr - Double Drilled Ring Gear for 3/8in. and 7/16in. Bolts - Front.