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Most of us enjoy the smooth, effortless feeling of driving an automatic transmission car. Driving is easy because you don’t have to worry about changing gears and you don’t have to work the clutch pedal. In an automatic transmission car, the clutch pedal is done automatically by a hidden component, which is truly an engineering marvel, the torque converter. The torque converter can multiply torque. Let’s see how this purely mechanical device performs its tasks.