The common torque converter layout dictates that the stator be prevented from rotating under any situation, hence the phrase stator. In practice, even so, the stator is mounted on an overrunning clutch, which prevents the stator from counter-rotating with respect towards the key mover but enables forward rotation. As explained https://kylerlepcp.blogacep.com/39234586/torque-converter-clutch-things-to-know-before-you-buy