On the E4OD, there is a little button on the shifter that allows you to turn the overdrive off. I was wondering what it was like so i hit the button to see the difference. The little "off" lit up orange so i figured it was working. After i drove it for a while, i couldnt tell a difference. What is it supposed to be like to drive it without OD?? is my OD off switch working properly? if not, what may be a common problem i can fix?