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Sheppard offers a full family of power steering gears for the heavy commercial and specialty vehicle market. The M-Series gears have been the industry design standard since 1986, using the highest quality materials and components, manufactured to extremely tight tolerances, and produced in the USA. Steering gear housings are made from compacted graphite iron for long life and durability. The rack & sector designs are fully ground for smooth operation with no backlash. M-Series gears, as do all Sheppard steering gears, employ a tapered spline on the sector output and pitman arm for problem free operation and safety.