General Information
Transmission
- The flywheel transfers the engine torque to the dual clutch. The flywheel and the dual clutch are connected to each other via splines. Together they take over the function of the dual mass flywheel.
- The transmission is built like a 6-speed manual transmission. The alternating hydraulic actuation of the two multi-plate dry clutches permits operation similar to that of an automatic transmission. This means that the gears are engaged automatically or manually with the Tiptronic mode. There is no clutch pedal.
- Both clutches are open when the ignition is switched off. 1st gear on sub-transmission 1 and reverse gear on sub-transmission 2 are engaged.
Selector Mechanism
In contrast to an automatic transmission, the selector lever position is no longer transmitted mechanically to the transmission via the selector lever cable and the multifunction transmission range switch (drive position sensor). The selector lever positions and shifts are transmitted via a separate control module in the selector mechanism to the transmission control module via the CAN bus. Shifting occurs without a cable. The selector lever cable mechanically brings the parking lock into the selector lever position "P".
Transmission Fluid and Gear Oil
The 6-speed S tronic dual clutch transmission and the front final drive have a shared transmission fluid fill.
The bevel box has a separate gear oil fill.
Shift Point Changes on Inclines and Declines
An additional gear change map automatically selects the gear changes for gradients depending on the accelerator pedal position and vehicle speed.
- The gear change map for extreme uphill stretches is matched to engine output
- The gear change map for extreme downhill stretches is matched to the braking effect of the engine.
- Direct gear selection via the Tiptronic function also permits utilization of the engine braking effect with a specific gear engaged, for example, on a downhill gradient when towing a trailer.