Should the solenoid operates properly, the situation might be within the torque converter by itself. In case the solenoid would not allow air to movement, area it inside a cleanse container of automated transmission fluid and electrically cycle it to see if you can eliminate any blockage through the solenoid. https://jaredpwzac.wizzardsblog.com/34193151/top-latest-five-torque-converter-clutch-urban-news