Since the turbine pace lags constantly driving the impeller (pump) speed, the speed ratio is lower than 1. Because of this There is certainly friction from the transmission fluid which ends up in electric power losses. To counter this influence, some autos have a torque converter using a lockup clutch. https://torqueconverterclutch22975.daneblogger.com/33072591/5-tips-about-torque-converter-clutch-you-can-use-today