Yukon 1541H alloy replacement rear axle for Dana 80, 37 spline (39.5->43.5) Full float axle (8X3.96). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.