1975 Dodge B300 Ring and Pinion Set RWD - Dana 70 Rear - Ring and Pinion Set - 4.56 Ratio - 5/8 in. Offset - 29 Spline Pinion - Fits 4 Series 4.56 & Up Carrier - Rear guaranteed to replace your current 1975 Dodge B300 Ring and Pinion Set RWD - Dana 70 Rear - Ring and Pinion Set - 4.56 Ratio - 5/8 in. Offset - 29 Spline Pinion - Fits 4 Series 4.56 & Up Carrier - Rear. 1975 Dodge B300 Ring and Pinion Set comes new OEM 1975 Dodge B300 Ring and Pinion Set aftermarket new 1975 Dodge B300 Ring and Pinion Set of remanufactured 1975 Dodge B300 Ring and Pinion Set RWD - Dana 70 Rear - Ring and Pinion Set - 4.56 Ratio - 5/8 in. Offset - 29 Spline Pinion - Fits 4 Series 4.56 & Up Carrier - Rear.