With the three-passage torque converter, two passages are employed for transmission oil (ATF) stream throughout the torque converter and for clutch cooling, even though the 3rd passage is applied independently to control the lock and unlock from the clutch. A torque converter clutch solenoid is usually a specialized electromagnetic unit https://edgarhgfcz.bloggazza.com/33004642/not-known-details-about-torque-converter-clutch