what trans to use for road race?

im not looking for personal prefrence i wana no if i have to switch to manual and what it entails for the conversion

Personal preference is what it boils down to. YOUR personal preference. You don't HAVE to change anything. People road race with autos all the time. People are giving you THEIR personal preference that they would use a manual. I am in agreement. Personal preference is most certainly what you're looking for.