Type of Fluid???

I have been using the type F in mine since I rebuilt it in the winter. No problems at all. I put a Cheetah manual valve body in it and I believe Turbo Action even reccomends the type F fluid. It shifts REAL hard when you get on it. The problem I had was finding enough type F fluid. Nobody had any, I had to buy a couple bottles here and a couple there . It was a real pain in the a$$ trying to locate a dozen bottles of it. And expensive too!