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 ...

"Give me a lever long enough and a fulcrum on which to place it, and I shall move the world." — Archimedes (287- 212 B.C.) On the street, everything is a compromise. Power is now easier to make than ...

Optional axle ratios can tailor pickup truck power and efficiency to suit your needs as long as the gearing keeps the engine in its torque sweet spot. Often overlooked, optional gear ratios play a key ...

As we marched into the era of electronically controlled transmissions, the debate was no different in the olden days when trying to decide between a Turbo 350 and Turbo 400. The TH350 is lighter and ...

Even good cars only give the driver two speeds to monitor: engine speed and vehicle speed. And while it’s the engine that ultimately does the work to turn the wheels and move a vehicle, a lot goes on ...

Gerhard started his career in automotive journalism in 2010, after finishing degrees in Communication, English, and Politics, and diplomas in Film and Art Appreciation and Graphic Design. He's ...

What if-and believe me, this is a hypothetical-you were trying to put a wild, rare, 200-hp naturally aspirated Autech SR20DE from the hottest of the nonturbo S15 Silvias into a first-generation Miata, ...

The new GM 10-speed automatic transmission is now either standard or an option on GM's full-size SUVs. In these applications, the new 10-speed is known as the Hydra-Matic 10L80 and is assigned GM RPO ...

A super-simple way to get the latest SRAM ratio gains from your ‘obsolete’ SRAM cable shifters and it’s not even hard to install - it will void your warranty though You can trust Cyclingnews Our ...

The GM Hydra-Matic 9T50 9-speed automatic transmission is a variant of GM’s 9TXX 9-speed automatic transmission family. Officially announced in December 2016 in conjunction with the 2017 Chevy Malibu ...