The double clutching technique is used by drivers who do not have good synchronous gearboxes and want to match the transmission speed with the engine speed. You can use it mainly in manual cars and not cars equipped with automatic transmissions because there will be no clutch pedal for depressing. The double clutch can be used both for upshifting as well as downshifting. Here you need to clutch two times to change gears. First, you need to press the clutch pedal; it will take the vehicle out of the gear. You have it release it and then press it again while slotting the lever into the next gear.