Yukon 1541H alloy rear axle kit for Ford 9 Bronco from '66-'75 with 31 splines. for use with 1 3/4 brakes. kit includes both rear axles, axle studs, bearing retainers and axle bearings. Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a five year warranty against manufacturing defects. Product Features:31 splineFits Ford 9 in 1966-1975 Bronco11 x 1.75 brakesIncludes two axles, axle bearings and seals, axle retainers and axle studs