At better speeds, the transmission spins at about 90 percent from the engine velocity. Preferably, nevertheless, the transmission would transfer at exactly the same speed as the engine, simply because this change in speed wastes power and triggers the assembly to lose heat. Slippage consumes electricity over the coupling stage. https://torque-converter-clutch29741.thechapblog.com/33118479/rumored-buzz-on-torque-converter-clutch