Torque converter can take benefit of the centrifugal force and throws the oil outside of it. It works like an oil pump. Fluid from within the converter casing spreads throughout the turbine. The turbine absorbs this fluid and begins rotation. It is actually immediately attached into the output shaft. https://gearbox20741.pointblog.net/the-smart-trick-of-gearbox-that-no-one-is-discussing-77385641