General Information

Transmission

• The 8-speed automatic transmission 0D5 is equipped with eight hydraulically activated forward gears. When the torque converter lock-up clutch is closed, these forward gears become manually driven gears through bypassing the torque converter slip.
• A special feature of the 0D5 transmission is the position of the front final drive (front axle differential with flange shafts) in front of the torque converter. This way an even distribution of the weight between the front and rear axles is attained.

Torque Converter

The torque converter is equipped with a slip-controlled torque converter lock-up clutch. Due to the new design of this transmission, the torque converter is located behind the front final drive.

Mechatronic

The Mechatronic combines the following components as a complete synchronized unit:

• Transmission Control Module -J217- hydraulic control
• the sensors and actuators

The Mechatronic unit is installed in the transmission in the area of the ATF pan.

Transmission Control Module -J217-

The control module is a component of the Mechatronic in the transmission.

Determining the driving situation and driving resistance dependent shift point occurs automatically.

Advantages:

• Shifting depends on fuel consumption
• Maximum engine output is always available
• Individual adaptation of shift points in all driving situations
• Gear shift points are infinitely variable

Shift Point Changes on Inclines and Declines

When driving on inclines or declines, gears are automatically selected using additional gear change maps. The selection is based on accelerator pedal position and the 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.
• By selecting a gear directly using tiptronic, the driver can use the engine braking effect with a specific gear engaged, for example when driving downhill with a trailer.

Shift Mechanism

• Under the "shift-by-wire" operating/shift concept, there is no longer a mechanical connection between the selector lever and the transmission. "Shift-by-wire" also means "electric shift".
• The driver is in control without a mechanical fall back.
• The selector lever does not move into shift gate for each selected driving gear as before, but rather it always returns to the starting position (neutral position) similar to a joystick. This means the selector lever position and transmission position selected do not match like before.
• The parking lock is electronically operated. In the case of an error a mechanical parking lock emergency release makes it possible to move the vehicle. Refer to EMERGENCY RELEASE FROM P .