Early Extension where the back KNEE and Belt Line move toward the ball. 2 things that we can do!!!!
One place a golf club across your chest with the club head outside your back shoulder. From your address position you should FEEL that you are tilting down toward the ball but correcting your leg/foot work to.
2nd stand an inch off the Wall, swing back with your Hands together as you do your back BUTT cheek should touch the wall. As transition forward you Hips will come off for a second but then your Right cheek as you get to Impact position.