The 3 major speed producers are the hands/wrists, arms & body.
Left hand: Make sure you get the pad of hand on top of the grip. Ideal for proper wrist caulk backswing.
Stance: Bend forward at the hips, not at the kness or the belt.
- As you swing club back, make 90 degree angle between left arm and club shaft at the top.
There should be a 90 degree angle between your right arm and forearm.
Lastly, there should be a 90 degree angle between your shoulders and your address angle. - Swing a piece of rope. Make your body and hips unwind and release the head of the rope on the downswing.
- Flip around your driver and grip it. Make swings with it and listen for the WOOSH!