Hmmm yea forgot about gear ratio. The computer might throw ya an error if it detects something funny so might want to stick to 03. I do know that if you were to want a different gear ratio that was offered on the 4t65e, it is an easy swap. Just don't remember if that involves any reprogramming.
Edit: also to answer the 2.85/3.05 question, from my experience the N/A has 3.05 (like my old Bonneville SE) and supercharged has 2.85 (like the Bonneville SSEi). More than likely you have the 3.05.
Last edited by yutzybrian; 10-07-2014 at 05:29 PM.