All transmissions have two key components: the gearbox plus the torque converter (or in the situation of the manual transmission, a clutch). The gearbox is answerable for really shifting the gears, although the torque converter really helps to transfer the ability from the motor to your gearbox. Handbook transmission buyers https://ericktndsh.idblogmaker.com/33229283/the-2-minute-rule-for-filter-gearbox