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Notes on tow-starting and towing > < When using test equipment while road-testing the vehicle

A3 Mk2

General notes on dual clutch gearbox 0AM
General notes on dual clutch gearbox 0AM
Gearbox
The engine torque is transferred to the dual clutch via the flywheel. The flywheel and the dual clutch are connected by splines. The two combined components perform the function of a dual-mass flywheel.
The layout of the gearbox is basically similar to that of a 7-speed manual gearbox. The two multi-plate dry clutches are regulated hydraulically and actuated alternately so that the gearbox is operated like an automatic gearbox, i.e. the gears are engaged automatically (or manually via the tiptronic function). There is no clutch pedal.
Both clutches are disengaged when the ignition is switched off. The 1st gear on gear train half 1 and the reverse gear on gear train half 2 are engaged.
   
The gearbox has an opening on the housing.
–  Make sure no small parts drop into the gearbox through this opening -arrow- when carrying out repairs. Cover the opening if necessary.

Selector mechanism
The selector lever position is no longer transmitted mechanically to the gearbox via the selector lever cable and multi-function switch (driving range sensor), as on the automatic gearbox. The selector lever positions and gear changes are transmitted to the gearbox control unit via CAN bus from a separate control unit in the shift unit. This means that gear shifts are effected without a cable. Exception: In selector lever position „P“ the selector lever cable is used to mechanically engage the parking lock.
   
Gear oil
The 7-speed dual clutch gearbox has two separate fluid fillings. One section is filled with gear oil -arrow A-, the other with hydraulic fluid -arrow B-.
Only the types of gear oil available as a replacement part may be used for the dual clutch gearbox 0AM. Other types of oil will cause malfunctions and/or failure of the gearbox; for part number refer to → Electronic parts catalogue.
The gear oil level cannot be checked. The correct gear oil level can only be achieved by replacing the gear oil, e.g. if the gearbox is leaking → Chapter „Renewing gear oil“.
Variation of gear-change points for gradients
An additional gear-change map automatically selects gear changes for gradients depending on accelerator pedal position and driving speed.
l  Gear-change map for extreme uphill gradients is matched to engine output
l  Gear-change map for extreme downhill gradients is matched to the braking effect of the engine
l  Increased engine braking effect can also be obtained by directly selecting a specific gear via the tiptronic function, e.g. when towing a trailer on downhill gradients
  A00-10380

Notes on tow-starting and towing > < When using test equipment while road-testing the vehicle