Yukon 1541H alloy right hand rear axle for Model 20 (Quadratrack set) with a length of 18 7/8 and 29 splines. Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy axles come with a five year warranty against manufacturing defects. This axle will not work with an Auburn Ected or a factory Powr Lok posi with two piece side gears. Product Features:29 spline18 7/8 longFits AMC Model 20 in 1976-1979 CJ7 with QuadtracOne piece axleRight hand side