Modern torque converters use electro hydraulic Command for that lock-up clutch. The hydraulic circuit which locks/unlocks the torque converter clutch is managed employing hydraulic valves. The valves are actuated specifically or indirectly by solenoids. The lifespan of a failing torque converter is unpredictable. It could very last a few days https://torqueconverterclutch37038.thelateblog.com/34484197/the-best-side-of-torque-converter-clutch