The vintage torque converter style and design dictates which the stator be prevented from rotating below any situation, that's why the term stator. In practice, on the other hand, the stator is mounted on an overrunning clutch, which helps prevent the stator from counter-rotating with regard to your prime mover https://torque-converter-clutch66418.bloguetechno.com/a-review-of-torque-converter-clutch-69098495