What is a Direct Shift Gearbox?
A DIRECT Shift Gearbox (DSG), also known as a dual-clutch gearbox, combines some of the best features of a manual with the convenience of an auto.
As a driver, though, you wouldn’t necessarily know the difference between a DSG and an automatic; the controls are virtually identical and a DSG tends to change gears in the same manner as a regular auto.
DSGs entered the mainstream in Volkswagen Group cars and are now widely used in VWs, Audis, SEATs, and Skodas. Other manufacturers also offer DSG-style transmissions, but with different names. In BMWs they’re called DCT, while Porsche uses the initials PDK, and in Fords they’re known as Powershift.
In effect, a DSG is two gearboxes in one, connected to the engine by two driveshafts. As well as two ’boxes there are also two clutches, all operated hydraulically by a combination of mechanics and electronics.
The gearbox that’s not in use is able to guess which gear you’re likely to want next and will prepare it for use. This allows for smooth, fast changes; each can happen in less than four hundredths of a second.
DSGs are also more efficient than
