The torque converter clutch solenoid is always energised (caught on) which translates to the torque converter becoming usually locked. Slippage consumes energy during the coupling phase. Locking the converter shell towards the turbine shaft helps prevent this slippage from transpiring. Antique illustration of adaptor transmission gearbox. ilbusca / Getty Visuals https://connerzzwur.popup-blog.com/33071399/5-tips-about-torque-converter-clutch-you-can-use-today