At one time it wasn't unusual for a hot rod's emphasis to be strictly based on performance; the goal may have been top speed on the dry lakes, or a low elapsed time at the dragstrip, but proper ...

What's the deal with the Jeep Wrangler Rubicon's four-to-one (4:1) transfer case? What about those 4.10 gears in those beefy Dana 44 axles? Why is it that when people put bigger tires on their ...

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 ...