1985 GMC G3500 Ring and Pinion Set G3500 - RWD - Dana 60 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - Fits 4 Series Carrier - Rear guaranteed to replace your current 1985 GMC G3500 Ring and Pinion Set G3500 - RWD - Dana 60 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - Fits 4 Series Carrier - Rear. 1985 GMC G3500 Ring and Pinion Set comes new OEM 1985 GMC G3500 Ring and Pinion Set aftermarket new 1985 GMC G3500 Ring and Pinion Set of remanufactured 1985 GMC G3500 Ring and Pinion Set G3500 - RWD - Dana 60 - Standard Rotation - Ring and Pinion Set - 4.88 Ratio - Fits 4 Series Carrier - Rear.