All transmissions have two main elements: the gearbox and also the torque converter (or in the case of the manual transmission, a clutch). The gearbox is to blame for truly changing the gears, even though the torque converter helps you to transfer the power through the motor for the gearbox. https://beckettkuagk.activablog.com/33235003/indicators-on-filter-gearbox-you-should-know