Most people know that if you leave the additive out it will make the clutches hold better. For a drag race car you want to leave the additive out completely. For street cars you want the clutches to slip smooth when turning corners, and that's what the additive does. The less additive you use the more grip the clutches will have. Too much additive will allow the clutches to slip too easy and you will be spinning one wheel.
I've been in the rear end business a long time. I've also been an oil dealer for over 13 years. I've been around and I know what I'm talking about.