The Direct-Shift Gearbox , commonly abbreviated to DSG, is an electronically controlled dual clutch

Dual clutch transmission

A dual clutch transmission, commonly abbreviated to DCT , is a differing type of semi-automatic or automated manual automotive transmission. It utilises two separate clutches for odd and even gear sets...

 multiple-shaft manual gearbox

Manual transmission

A manual transmission, also known as a manual gearbox or standard transmission is a type of transmission used in motor vehicle applications...

, in a transaxle

Transaxle

In the automotive field, a transaxle is a major mechanical component that combines the functionality of the transmission, the differential, and associated components of the driven axle into one integrated assembly....

 design - without a conventional clutch

Clutch

A clutch is a mechanical device which provides for the transmission of power from one component to another...

 pedal

Automobile pedal

An automobile may have two to four foot pedals. The arrangement is the same for both right- and left-hand traffic. From left to right:* normally operated by the left foot:**clutch pedal, not in the case of automatic transmission...

, and with full automatic, or semi-manual control. The first actual Dual Clutch transmissions derived from Porsche in-house development for 962 racing cars in the 1980s.

In simple terms, it is two separate manual gearboxes (and clutches), contained within one housing, and working as one unit.