The torque converter is exactly what transfers ability in the motor to the gearbox. It is just a fluid coupling that makes use of hydraulic force to multiply the torque from the motor. The torque converter is manufactured up of 3 key pieces: the pump, the turbine, plus the stator. https://filter-gearbox41608.topbloghub.com/40433056/indicators-on-filter-gearbox-you-should-know