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