If You Take The Same Eng. And Car Set Up The 4 Speed Is Limited To What Ratios You Can Run, But The Auto Can Be Changed With Gearing And Converters . Sorry But The 4 Speed Loses Every Time. The Reation Time Is On The Ability Of Driver. Now You Guys That Are Setting Up For Standard Trans And Changing Supension , The Question Was The Same Set Up. We Are Talking Trans For Trans. Did You Read The Post?