Since the turbine pace lags constantly driving the impeller (pump) velocity, the velocity ratio is under 1. Therefore there is friction during the transmission fluid which results in electric power losses. Slippage consumes electricity in the course of the coupling section. Locking the converter shell to the turbine shaft helps https://franciscoynalv.iyublog.com/33124382/helping-the-others-realize-the-advantages-of-torque-converter-clutch