The Simple Side of Gear Ratios We'll start with a look at the simple side of gear ratios. Archimedes would recognize that gears are a form of leverage.

The crawl ratio is a simple number that you can find by using the following equation (First gear ratio in the transmission x the transfer case low range ratio x the differential gear ratio).

By comparison, the new Wrangler Rubicon with a manual transmission has a first gear ratio of 4.46, a 4-to-1 transfer case, and 4.10 axle ratios. This equates to an enormous crawl ratio of 73!

A higher overall numerical gear ratio raises rpm, and a lower numerical gear ratio lowers it. Simple, right?

Read more about gear and final drive ratios and how to calculate these figures using Excel in Sport Compact Car magazine.

A trial to restrict gear ratios and slow down professional cyclists will be conducted later this year, cycling's world governing body the UCI confirmed on Friday.

Planetary units with helical gears, rather than spur gears, have a larger contact ratio. The contact ratio is the number of teeth in mesh at any given moment.

The film *Spinning Levers* explores the fundamental mechanics of levers and gears, illustrating their role in various everyday applications and in the complex workings of a car’s transmission ...

Mack Trucks Inc has introduced the new Maxitorque ES T300 family of transmissions, which feature a triple countershaft design, high-torque capacities, ...