The basic torque converter structure dictates the stator be prevented from rotating below any condition, that's why the term stator. In practice, even so, the stator is mounted on an overrunning clutch, which prevents the stator from counter-rotating with regard to the key mover but will allow ahead rotation. The https://torqueconverterclutch19740.wssblogs.com/33931735/torque-converter-clutch-no-further-a-mystery