Renault has developed a six-speed, dual clutch transmission gearbox entitled Efficient Dual Clutch (EDC) which delivers a standard of fuel consumption and CO2 emissions which marks a significant step forward compared with that of conventional automatic transmissions (a gain of up to 17% which can save approximately 30g/km).

The EDC is a combination of two parallel half gearboxes, which work together and are both designed like a traditional manual gearbox. The engine torque is transmitted to each half gearbox via a specific clutch:

  • One clutch looks after the odd-number gears (1st, 3rd and 5th)
  • The second clutch covers the even-number gears (2nd, 4th and 6th), as well as reverse.

At the perfect moment gears are changed by shifting from one clutch to the other, the first clutch opens whilst the second closes simultaneously which guarantees continuous and smooth traction during gear changes.