Hi, Rodney here. I am about to Explain to you a simple drill to help you strengthen the sequence of your transition. A common fault in golf is where to begin the downswing, either the club head will move first or the upper body will move first. It could create a variety of problems: (over the top, steep, loss of club head speed, early releasing.)
So, pro-transition could cause many problems. I am going to Show you the correct sequence of the downswing. I want to do the drill called waist-high swings. You're going to bring the club to about parallel to the ground. Basically from here, you're going to learn how to sequence your downswing.
You're going to learn to start the downswing with a rotation and a weight shift to your left foot. As you're doing this, the shoulder shouldn't be moving. The arms and the club should remain stationary also. This will be gaining some separation between lower body and upper body. Then, your shoulders will follow that hip rotation, and your arms, and then lastly, the club.
When you find yourself doing it correctly, even from a short swing stationary position, you need to be able to compress the ball and create some club head speed. If you've got the fault of starting the swing with your club head, you might discover it very difficult to start with. You might still start the downswing from this position with the club head, but you won't be able to create a solid contact, and it will be a very weak ball flight. Keep working on it. Continue learning from here to start the downswing with your lower body rather than the club head and the upper body. From here, simply swing through,let the components (the shoulders, arms, and club head) follow that initial movement from the lower body. You have to create a few pumps of the hips, one, two, three, before you go. Practice it until you can create some good speed from this static position. You've got to feel for the correct sequence and add that same feeling to your full swing.
Here is a video to demonstration what I've just said
