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Unit-IPower Unit and Gear Box:Principles of Design of main components. Valve mechanism. Power and Torquecharacteristics. Rolling, air and gradient resistance. Tractive effort. Gear Box. Gear ratiodetermination. Design of Gear box. 7Unit-IITransmission System:Requirements. Clutches. Toque converters. Over Drive and free wheel, Universaljoint. Differential Gear Mechanism of Rear Axle. Automatic transmission, Steering andFront Axle. Castor Angle, wheel camber & Toe-in, Toe-out etc.. Steering geometry.Ackerman mechanism, Understeer and Oversteer. 8Unit-IIIBraking