The torque converter clutch solenoid is often energised (trapped on) which translates in the torque converter being often locked. The torque converter is situated in between the motor plus the transmission. HowStuffWorks A torque converter is often a form of fluid coupling, which allows the motor to spin relatively independently https://edgarxbbax.pointblog.net/the-2-minute-rule-for-torque-converter-clutch-78218366