Steering system:     The steering system permits the front wheel s to be pivoted on their supports to the right or left so that the car can be steered.                 Power train:     The power train contains several mechanisms which carry the engine power to the rear wheels. And they are clutch, transmission, propeller shaft, differential and rear axles.                   Differential:     A car differential contains gears that carry the driving power from the propeller shaft to the rear wheels can rotate different amounts when the car goes around a turn.                        
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