Axle Solid Wide 5 31 Spline

The Axle Solid Wide 5 31 Spline by PEM is a heavy-duty axle shaft engineered for high-performance vehicles and serious custom builds. Designed for enthusiasts upgrading to Wide 5 bolt patterns—common in drag racing, circle track competition, and vintage hot rod restorations—this solid axle eliminates the play and flex inherent in tube-type designs. If you're building a dedicated race car or modernizing a classic with contemporary suspension geometry, this component delivers the structural integrity and load-carrying capacity required for repeated high-stress acceleration and cornering.

The 31-spline configuration provides maximum torque transfer efficiency and hub engagement surface area, critical when you're feeding power from modern engines or supercharged mills. A solid (non-hollow) construction eliminates torsional wind-up and failure modes associated with lighter tube designs, making it the preferred choice for dedicated competition platforms where reliability under load is non-negotiable. Weighing 9.8 lbs and measuring 40 inches in length, this shaft is sized for mid-to-rear-wheel-drive axle housings typical of 9-inch and similar performance platforms, delivering a rigid connection between differential and wheel hub that translates engine output directly to pavement without energy loss through flex or deflection.

This axle is ideal for drag racers, circle track competitors, street machine builders, and restoration specialists working with Wide 5 rear end assemblies. Installation requires proper axle bearing support and hub alignment to maximize service life; verify spline count on your differential housing and confirm bolt pattern compatibility before ordering. The solid construction demands precise measurement and fits best with aftermarket axle housings designed for this spline specification, making it essential to confirm your housing's exact requirements and have the shaft pressed into place by an experienced shop equipped with the proper tooling.