Contemporary torque converters use electro hydraulic Command for that lock-up clutch. The hydraulic circuit which locks/unlocks the torque converter clutch is managed making use of hydraulic valves. The valves are actuated directly or indirectly by solenoids. Finally, galling on the mating pieces takes place, which triggers seizure. A converter using https://torque-converter-clutch40470.thelateblog.com/34483632/details-fiction-and-torque-converter-clutch