Torq-Masters FS-20031 TORQ Full Spool for Polaris Turbo R – 31 SplineHow it Works: The TORQ Full Spool takes the place of your 2 stock hubs and sprague in the Polaris front differential. You will reuse or install new bearings. The Full Spool replaces all the small moving parts that are prone to failures, the sprague, armature plate, rollers, etc, and replaces them with solid American made 9310 hardened alloy steel. Because this is a Spool, both axle shafts will turn at the same speed which can take more effort to steer