At bigger speeds, the transmission spins at about 90 % of your motor speed. Preferably, nevertheless, the transmission would go at exactly the same speed because the motor, since this change in speed wastes electric power and will cause the assembly to lose heat. So, you suspect your torque converter https://torque-converter-clutch37924.boyblogguide.com/33004974/torque-converter-clutch-for-dummies