Torque converter
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
The torque converter for the 01M transmission is equipped with a lock-up clutch. The lock-up clutch is closed depending on load and speed and drives 1st, 2nd, 3rd and 4th gears mechanically independent of slip.