When the fluid heads back towards the turbine, it does so with additional torque, resulting in the turbine to provide far more torque for the transmission. The car starts going ahead. Bigger gears supply far more speed as opposed to torque, that is great for sleek  driving over the freeway.  https://gearboxauto55319.blogginaway.com/33102211/a-simple-key-for-gearbox-auto-unveiled