Mechanical Design and Gearbox

Mechanical Design of the Gearbox

The mechanical power transmission of the gearbox has been optimized with regard to gearshift comfort, quality and reduced fuel consumption. The engine torque is transferred to the gearbox by a torque converter with a controlled lockup clutch. The six forward gears and the reverse gear are produced by a Lepelletier planetary gear train. The gears are shifted by multi-disc clutches.

The new automatic gearbox has the following advantages:

- Designed as a 6-speed gearbox with an overdrive ratio in 5th and 6th gear, fuel consumption is reduced by up to 5 percent.
- The 6-speed gearbox allows for more gear spread, improving vehicle acceleration.

- The new 6-speed gearbox is approximately 30 kg lighter and 50 mm shorter as compared to the previously used gearbox (A5S560Z).
- The number of transmission components has been reduced from approx. 660 parts in a 5-speed gearbox to approx. 470 parts for the new 6-speed gearbox.
- The number of interfaces has been reduced by using the Mechatronics Module for the electronic transmission.