Inside the graphic higher than you could begin to see the variation with the torque converter performance purpose of your velocity ratio (green line). The torque converter efficiency characteristic has 4 unique details of operation: The control of the oil force within the lock-up clutch is done via two valves: https://kylerwyxvr.bloggin-ads.com/57468077/5-simple-statements-about-torque-converter-clutch-explained