General Repair Information

The highest level of care and cleanliness along with tools that function properly are required to ensure a proper and successful transmission repair. Of course the general safety precautions also apply when carrying out repair work.

General information that applies to various different repair procedures is listed here instead of repeating it multiple times throughout the service information. They apply to this repair information.

Guided Fault Finding  , OBD and Test Instruments

• Before starting any repairs on the transmission, determine the exact cause of the damage if possible using the Vehicle Diagnostic Tester in Guided Fault Finding  , OBD  or Test Instruments  .

Special Tools 

For a complete list of special tools used in the repair information, refer to Workshop Equipment and Special Tools.

Transmission 

Always make sure that no dirt can get into an >>open<< transmission. Any dirt that enters can cause transmission failure, especially if the Dual-Clutch Transmission Mechatronic -J743- and/or the oil pump are >>exposed<<.

• Do not run the engine and do not tow the vehicle if the transmission cover is removed or if there is no transmission fluid inside the transmission.
• Thoroughly clean the connection points and the area around them first, and then loosen them.
• When installing the transmission, make sure the alignment sleeves are seated correctly between the engine and the transmission.

Circlips 

• Do not stretch the circlips.
• Replace damaged or stretched circlips.
• The circlips must rest at the bottom of the groove.