Vehicle speed (mph), engine speed (rpm), tire diameter (inches), trans gear ratio, and rear axle gear ratio are all interrelated. If you know four out of five of these values, you can determine what ...

Few vehicle modifications have as major an impact as changing gear ratios, and it's because your car's gear ratio directly translates to how it delivers power. Think about it: The gear ratio, or how ...

One of the 2021 Ford Bronco's most interesting features is the available seven-speed manual transmission. If seven gear ratios seem odd, it's because it is. It's remarkable that in a time when manual ...