Sewart Supply offers a complete line of Twin Disc Power Shift Transmissions ranging in size from 75 to 1600 hp.  Available in 11 different series (400, 510, 800, 1130, 1300, 1600, 2000, 2600, 2800, 3130, and 7000), the Sewart transmissions are designed for easy maintenance and operation.  The Sewart power shift transmissions are engineered for fast shift, flexibility and the utilization of less horsepower at higher operating speeds.