What is a dual-clutch transmission (DCT)?
A dual-clutch transmission (or DCT) is a type of automatic gearbox that changes gears incredibly quickly by using two clutches. One clutch will be engage the gear that's driving the car, while the other will be ready and waiting with the next gear. When you change gear, there's a nearly instantaneous changeover between the gears, which means a DCT is much faster at shifting than a normal torque-converter auto. Volkswagen's DSG automatic is a popular brand name for a dual-clutch transmission. The downsides? Well, a DCT gearbox is complicated and expensive to fix if it goes wrong, and they tend to add a premium to the car when you buy it new.
Related glossary terms
AutomaticAn automatic gearbox is one that changes gears for you, without the need to use a clutch pedal and gear lever.CVT - continuously variable transmissionA continuously variable transmission (or CVT) is a form of automatic gearbox that can change through an almost endless number of gear ratios, ensuring the engine is always operating at peak efficiency.DCT - dual clutch transmissionPaddle shifters are the most common way to shift gears manually in automatic and semi-automatic cars.