This suggests that there's a number of electrical power dropped while in the torque converter, dissipated as heat. So that you can make improvements to its efficiency, makers added a lock-up clutch for the torque converter. Torque converter equations of movement are governed by Leonhard Euler's eighteenth century turbomachine equation: https://gregoryundqc.frewwebs.com/34507355/5-simple-techniques-for-torque-converter-clutch