Now you are able to test to apply the drive gear. Listen diligently if you can hear any signs of noise through the torque converter. Slippage consumes energy in the coupling period. Locking the converter shell towards the turbine shaft prevents this slippage from taking place. Antique illustration of adaptor https://torqueconverterclutch75296.goabroadblog.com/33073821/torque-converter-clutch-an-overview