To counter this result, some cars and trucks Possess a torque converter with a lockup clutch. Once the two halves on the torque converter get up to the mark, this clutch locks them collectively, ensuring which the motor and gearbox spin at precisely the same velocity and reducing energy reduction. https://torque-converter-clutch19616.shotblogs.com/5-simple-statements-about-torque-converter-clutch-explained-48180842