Should the solenoid operates thoroughly, the condition is most likely within the torque converter itself. If the solenoid doesn't let air to circulation, position it in a clean up container of computerized transmission fluid and electrically cycle it to view if you can take out any blockage with the solenoid. https://rowanahlmn.eedblog.com/34351475/an-unbiased-view-of-torque-converter-clutch