I've got 4.56 gears in my new 9" rearend. When I calculate the tire/gear ratio (26/4.56 = 5.46) and click commit it says invalid entry! It won't let me input anything lower than 6.00. Is there a way to make this work or is it yet another reason '98 cars suck w/tuning software?? I'd really like my speedometer/odometer to read correctly, any help is appreciated.