Used pair of 31 spline axles for the 1971 Mercury Cougar or 1971-72 Ford Mustang, equipped with the Boss 351 or 429 CJ engines all with 9 inch rear axles. Most all other vehicles used 28 spline axles. Short axle 27-13/16" inches long and long axle 31-25/32" inches long.
Ford part numbers D1ZZ-4234-A and D1ZZ-4234-B.
Ships with used bearing, bearing retainer plate, and 5 pressed in wheel studs.