1988 GMC G3500 Ring and Pinion Set G3500 - RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.88 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear guaranteed to replace your current 1988 GMC G3500 Ring and Pinion Set G3500 - RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.88 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear. 1988 GMC G3500 Ring and Pinion Set comes new OEM 1988 GMC G3500 Ring and Pinion Set aftermarket new 1988 GMC G3500 Ring and Pinion Set of remanufactured 1988 GMC G3500 Ring and Pinion Set G3500 - RWD - GM 10.5 in Rear - w/ 14 Bolt Cover - 4.88 Ratio - Thick Ring and Pinion Set - Fits 3 series 4.10 & Down Carrier - Rear.