With regards to the variety of passages (ports) for controlling the oil movement in the torque converter clutch, there are many different types of torque converters: This is the feature past what a simple fluid coupling presents, which may match rotational speed but doesn't multiply torque. Fluid-coupling–dependent torque converters also https://beaufsckr.bloggip.com/34045673/not-known-details-about-torque-converter-clutch