If we have a 4.11 axle ratio, a 30-tooth over a 22-tooth QC ratio being 1.3636, then our drive ratio (DR) is 5.6045. If we then divide the tire circumference of 85 inches by the DR, our final ...

The basic types of adjustable-speed drives are geared transmissions (which provide only specific fixed-speed ratios), variable-pitch belt and chain drives (which provide infinitely variable speeds ...

CVTs have been largely adopted by the side-by-side world as they're perfect for most every type of off-roading. But a CVT ...

Manual transmissions may have the benefit of a low, granny first gear that is great to add additional low gearing on a 4WD. Automatic transmissions also vary a bit with respect to first-gear ratio.

EVs can even have more gears for specific performance goals — some production EVs have had a two-speed transmission, for example — but they don’t need them.

By fitting the Bronco with the 6.588:1 crawler gear, Ford has essentially given owners the choice of both the crawl ratio of a vehicle with a standard 2.72:1 low range and one with a 4.10:1.

In the late 19th century, automotive pioneer Milton Reeves utilized the concept to control the speed of saws in a sawmill, ...

The gear ratio, Kwasniewski says, is the number of teeth on the ring gear divided by the number of teeth on the pinion. For example, 3.55 axle ratio would have 39 gear teeth and 11 on the pinion.

Here’s an analysis of a single planetary gearset. One of the planetary gearsets has a roller gear with 72 teeth and a sun gear with 30 teeth. Designers can get lots of different gear ratios out ...