 Either way, it'd be fine because since it's not moving at all, I don't feel you're getting any damage done. You're not slipping. You're just not moving. It's not in gear at all. And I think what's happening is the solenoid comes on, commands the valve body to move, and either the solenoid is not working properly, so it's not moving the valve, or the solenoid is working and the valve is stuck and not moving fully and letting it engage. Because once it's engaged, it drives just fine, right?