More recent varieties of automatic transmission, just like the semi-manual gearbox and CVT use other methods of ability delivery, And do not contain torque converters. A torque converter are not able to attain 100 percent coupling efficiency. The basic 3 factor torque converter has an effectiveness curve that resembles ∩: https://torque-converter-clutch51592.prublogger.com/33136562/the-smart-trick-of-torque-converter-clutch-that-nobody-is-discussing