There are many more driven gears available than drive gears. In traditional GM transmissions, typically available TH350 (also fits most manual boxes) driven gear selection ranges from 18 to 25 teeth.

Bear with me while I complain like a little girl whose shoes are too tight. I'm sick of answering the same "Why doesn't my speedometer register correctly since I swapped tire sizes?" question over and ...

If you've ever performed any kind of driveline or wheel and tire swap, you're probably familiar with speedometer calibration. By stepping up to larger tires and/or wheels, the speedometer reads slow ...