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The ductile-iron RockJock III housing is Currie's latest addition to the RockJock lineup and the most economically priced of the family. One of the benefits of the high-pinion housing is that it allows the gearset to mesh on the stronger drive side of the gear when applied as a front axle, and gains lubrication from both an upper and lower oil valley, keeping the bearings and gears cooler for increased life and performance of the axle.