1985 Chevrolet Astro Van Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear guaranteed to replace your current 1985 Chevrolet Astro Van Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear. 1985 Chevrolet Astro Van Ring and Pinion Set comes new OEM 1985 Chevrolet Astro Van Ring and Pinion Set aftermarket new 1985 Chevrolet Astro Van Ring and Pinion Set of remanufactured 1985 Chevrolet Astro Van Ring and Pinion Set RWD - GM 7.5 in. & 7.625 in Rear - Ring and Pinion Set - 4.30 Ratio - Fits 3.23 & Up Carrier - Rear.