The Yukon Ford 9"early pass, 31 Spline, dble drilled, 23.25" -33.00" cut to length. (Part number YA F9-31-33.00) Yukon Gear & Axle offers an extensive line of general replacement and high-performance axles for passenger car, truck and SUV applications. High-quality alloys and the latest in heat-treating technologies provide a stronger-than-stock axle for off-road, on the street, or at the track.