Chevrolet K20 Parts And Chevrolet K20 Accessories
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If you are planning on replacing the transmission or steering of your Chevrolet K20 van, one thing that you will need to take into consideration is the gear ratio. A must for both regular car owners and performance vehicle enthusiasts alike, determining the gear ratio is essential in ensuring the K20 will perform at an optimum level and keep wear to a minimum.
Defined, the gear ratio is the relationship between any two gears. In the Chevy K20 and autos in general, this refers to the transmission and steering gears. These gears inside the K20 come in various shapes, sizes, and number of teeth, which causes each gear to spin at different speeds. And the rate at how the fast one gear spins against its immediate counterpart is the gear ratio.
To put this into perspective, a transmission gear that has twice the diameter will cause the smaller gear to spin twice as fast. This results with a gear ratio of 2:1.
The gears found in the transmission and steering system of the Chevrolet K20 have had their ratios pre-adjusted at the factory so that they are able to function seamlessly and at an optimum level, so there is no need to tinker with the ratios if the transmission and steering work fine. However, if you will be replacing any of the steering components, such as the steering column, drive axle, or any of the gears in the powertrain, the replacement component may need some modifications.
If you have replaced one of the transmission gears of the K20 or the entire gearbox assembly, determining the gear ratios becomes an integral part of the installation process for the transmission components.
In addition to being critical in replacing transmission parts, gear ratios are also important in upgrading to customized wheels, tires, suspension, steering, and transmission components. Any change to these components will affect the gear ratios of the vehicle, so adjusting it to accommodate to the modified components will help ensure these parts are not damaged and the vehicle runs smoothly.
One simple way to determine the gear ratio in your Chevy K20 is by looking at a tiny metal tag that\'s bolted onto the differential and/or transmission cover. This tag contains, among other things, the gear ratio the factory gear teeth count. You can also remove the differential or transmission cover and count the number of teeth individually and use that to calculate the ratio. Driveshaft gear ratios can also be calculated by jacking up the wheels, disconnecting the driveshaft, rotating one of the wheels, and counting the number of revolutions the pinion yoke or flange makes for every spin.
More recently, so-called gear ratio charts and tables are now also available online. These charts, which can be obtained from online service manuals as well as in Chevy enthusiast websites, contain the exact gear ratios for various models of the Chevrolet K20 which you can use to cross-reference with your car.