A solenoid is actually a linear electrical actuator. When is remaining energised (provided with electrical Strength) it pushes or pulls a rod that's linked to the hydraulic valve. There are actually differing kinds of solenoid used for torque converter clutch control, but the principle of Doing work is largely precisely https://torque-converter-clutch50371.bleepblogs.com/34444402/torque-converter-clutch-can-be-fun-for-anyone