Torque converter usually takes benefit of the centrifugal power and throws the oil outside of it. It works like an oil pump. Fluid from inside the converter casing spreads throughout the turbine. The turbine absorbs this fluid and commences rotation. It can be instantly attached on the output shaft. https://gearbox16920.onesmablog.com/the-smart-trick-of-gearbox-that-no-one-is-discussing-74400619