Whats the science behind the change Ralph? Is more fan blades - greater drive or smoother drive? Why did you change - what are the drivers? As you stated in a previous entry Marks4x4 were playing around with a computer code manipulation - what are your thoughts on this re success and why didn't you go this way? Is this auto tranny controlled with an electronic system or mech only? I don't know anything about auto trans design or theory - eager to learn.