This suggests that there is a large amount of ability lost from the torque converter, dissipated as heat. So as to make improvements to its efficiency, suppliers added a lock-up clutch to the torque converter. M (utmost efficiency issue): in this position the torque converter hits its optimum effectiveness as https://torque-converter-clutch79123.blog-eye.com/34110936/the-definitive-guide-to-torque-converter-clutch