A solenoid is usually a linear electrical actuator. When is remaining energised (provided with electric Strength) it pushes or pulls a rod that's connected to the hydraulic valve. There are actually differing kinds of solenoid used for torque converter clutch Command, but the principle of Performing is basically the same. https://rafaelstsqm.blogsvila.com/34123987/facts-about-torque-converter-clutch-revealed