All transmissions have two key elements: the gearbox as well as torque converter (or in the situation of a manual transmission, a clutch). The gearbox is answerable for in fact shifting the gears, even though the torque converter helps you to transfer the power within the motor for the gearbox. https://augustnppok.tinyblogging.com/5-simple-statements-about-filter-gearbox-explained-77762030