| Notes on the automatic 6-speed gearbox 09L |
| The 6-speed automatic gearbox 09L (four-wheel drive) has six hydraulically activated forward gears. When the lock-up clutch is closed these forward gears become mechanically driven gears by cutting out the torque converter slip. |
| The torque converter is equipped with a slip-controlled lock-up clutch. |
| The mechatronic unit incorporates the hydraulic control system, the electronic automatic gearbox control unit -J217-, the multi-function switch -F125- and the sensors and actuators as a complete unit. The mechatronic unit is installed in the gearbox within the oil pan. |
| Automatic gearbox control unit -J217- |
| The control unit is part of the mechatronic unit in the gearbox. |
| The gear change points are calculated automatically (depending on the driving situation and the resistance to motion). |
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| Gear changes are timed for maximum fuel economy. |
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| Maximum engine output is always available |
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| Individual adaptation of gear change points in all driving situations |
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| Gear change points are infinitely variable |
| Before performing repairs to the automatic gearbox, determine the cause of the fault as precisely as possible using “Guided fault finding”. |
| “Guided Fault Finding” is performed using the vehicle diagnostic, testing and information system -VAS 5051 A-. |
| 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. |
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| Gear change map for extreme uphill gradients is matched to engine output |
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| Gear change map for extreme downhill gradients is matched to the braking effect of the engine |
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| 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. |
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