And there's the problem. If you don't have any power in your lower half, you're probably throwing with just your arm, and that can be disastrous. You need to learn, work with and master "The Secret"---something I learned a long time ago by watching how the Yankees' Big Three rotation did it. Those three guys---Vic Raschi, Allie Reynolds and Eddie Lopat---were all driving off that lower half, using the legs, the hips and the torso in one continuous (and, it seemed to me, seamless) motion, creating a nonstop flow of energy all the way up through the shoulder and arm and thus generating more power behind their pitches. I saw just how they were doing this---you're right, it's all about coordination---and I made a note of it and started working on it on my own. As I practiced this essential element of good mechanics I found that I was doing the same thing those three pitchers were doing, and it came easier to me because I was a natural, honest-to-gosh sidearmer.
A good place to start is with the "Hershiser" drill which aims at getting the hips fully involved. No special equipment is needed for this, just a fence or a wall, and as you work on this you will discover that those hips are actually a connection between the two halves of the body. Make use of it; it will pay off in the long run. :baseballpitcher: