Alright so me and my buddy hooked up his xcalibrator 2 in his 2003 GT and it has major problems. For example we were in third gear at 3500 rpm's and his speedo was pegged! It said we were going 150 haha. Also his O/D light is on now. I duno what would make his his speedometer go so wacko and his O/D light - No Idea, so if someone could help that would be great.