General Information
Transmission
- The flywheel transfers the engine torque to the double clutch. The flywheel and the dual clutch are connected via splines. Together they assume the function of the dual-mass flywheel.
- The transmission is built like a 6-speed manual transmission. The alternating hydraulic actuation of the two dry multi-plate clutches permits operation similar to that of an automatic transmission. The gears are engaged automatically or manually with the Tiptronic mode. Clutch pedal is not available.
- Both clutches are open when the ignition is off. 1st gear on sub-transmission 1 and reverse gear on sub-transmission 2 are engaged.
Selector Mechanism
In contrast to the automatic transmission, the selector lever position is no longer transmitted mechanically to the transmission via the selector lever cable and Multi-Function Transmission Range (drive position sensor). Selector lever positions and shifts are transmitted via a separate control module in the selector mechanism function unit to the transmission control module via the CAN-Bus. The shifting occurs without a cable. The selector lever cable is mechanically brought into the park brake in the selector lever position "P".
Gear Oil and Axle Oil
The 6 speed S tronic transmission and the front final drive have the same transmission fluid.
The bevel box has a separate axle oil fill.
Danger of causing damage to the transmission.
- Only the transmission fluid available as a replacement part may be used in the 6 speed S tronic transmission 0D9. Refer to the Parts Information.
- Only the gear oil available as a replacement part may be used in the bevel box. Refer to the Parts Information.
- Using other fluids can cause malfunctions or transmission failure.
Shift Point Changes on Inclines and Declines
An additional gear change map automatically selects the gear changes for gradients dependent upon accelerator pedal position and driving 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 by way of the Tiptronic function permits utilization of engine braking action with a specific gear engaged, for example, on a downhill gradient with a trailer.