Although the two transmission varieties transfer motor torque to the wheels, they differ mechanically As well as in driving working experience: Greater gears supply more speed rather than torque, that is great for clean  driving on the freeway.  Cutaway perspective of the ZF 8HP transmission: torque converter on the left, https://devinvwvtr.goabroadblog.com/32760906/a-secret-weapon-for-gearbox-auto