Ford Racing 8.8 Inch 3.73 Ring Gear and Pinion

Ford Racing ring and pinion sets are engineered, manufactured, and tested for maximum performance. These ring and pinion sets are finished in a black oxide coating for corrosion resistance, and are available in many different ratios to fit a variety of Ford differentials. ** Note: 3.15 Ratio Differential not compatible with 3/31, 3.55, 3.73 and 4.09 ratio gears. Use differential M-4204-MT or M-4204-M. * This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this art on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.This Part Fits: Year Make Model Submodel 1990-1997 Ford Aerostar Base 1990-1994 Ford Aerostar Eddie Bauer 1990-1994 Ford Aerostar XL 1990-1994 Ford Aerostar XL Plus 1991-1994 Ford Aerostar XL Sport 1990-1997 Ford Aerostar XLT 1990-1997 Ford Aerostar XLT Plus