How to calculate gear ratio in a differential

If you know your gear ratio then this doubles as a Vehicle Speed Calculator Just type in your info press calculate and youll get the right gear ratio without the guesswork. Divide the number of teeth on each driven gear by the number of teeth on the drive gear for each interlocking set of gears to calculate the intermediate gear ratios.

This calculator will provide the speed of the vehicle based on transmission gear ratio engine RPM tire height and the ring gear and pinion gear ratio in the rear end axle differential housing.

How to calculate gear ratio in a differential. Differential Gear Ratio Calculator Tire Diameter Calculator. In order to select the ideal differential gear ratio the first thing you will need to know is. Use the RPM calculator to determine what RPM your engine will run based on gear ratio tire diameter.

Differential Gear Ratio Calculator. A gear ratio is calculated by dividing the number of teeth of the driving gear by the number of teeth of the driven gear. Rear End Gear Calculator.

Axle ratio or rear end gear ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. Identify the Ring and Pinion Gear Ratio you currently have by counting the teeth on the Ring and Pinion gears. Enter the number of teeth on your ring and pinion gear set in the calculator below to find the gear ratio or simply divide Ring Gear tooth count by Pinion Gear tooth count Example.

Ring Gear Pinion Gear Ratio. Gear Ratio Try our simple and easy to use Gear Ratio Calculator to quickly find the correct gear ratio for your differential. Simply enter the number of teeth on your ring gear and pinion gear and click the Solve button.

Rear-End Differential Gear Ratio Calculator. Enter the maximum potential safe engine RPM. Enter the tire size diameter and the target vehicle speed in MPH.

Click Calculate Gear Ratio. The value will be returned in estimated differential gear ratio based on the entered values. How to Calculate the Rear Axle Gear Ratio.

Slide a floor jack under the rear of the vehicle and raise it until the rear wheels are off the ground. Place jack stands under the rear axle. Part 3 of 5.

Determining an approximation of your cars gear ratio Step 1. Place a visible mark on the driveshaft near the differential housing. Use the chalk or paint pen.

Spin the driveshaft by hand. While spinning the driveshaft count the revolutions by watching the. Treat the preceding gear as if it were the drive gear as far as the next gear is concerned.

Divide the number of teeth on each driven gear by the number of teeth on the drive gear for each interlocking set of gears to calculate the intermediate gear ratios. In our example the intermediate gear ratios are 207 29 and 3020 15. Select the value you want to solve for.

For the Tire field enter your tire diameter in inches. If you know your gear ratio then this doubles as a Vehicle Speed Calculator Just type in your info press calculate and youll get the right gear ratio without the guesswork. You should be able to find your gear ratio listed on the axle tag however if that has gone missing you can simply count the number of teeth on each gear and divide the number of ring gear teeth by the number of pinion gear teeth.

Ring Gear Teeth Pinion Gear Teeth 41 11 373. The rear axle ratio of your car is instrumental in determining which transmission gear set is best suited for your car. It is also important to know the ratio as well as tire size to determine which speedometer gear you need so your speedometer reads accurately.

By following these directions you can determine what the axle ratio is in your car. A Gear train consist of two or more number of gears in series. It is used to increase or decrease the speed or torque of the output shaft.

The term Gear Ratio is used to calculate speed and torque of output gear when torque is applied to the input gear. To determine the distance the vehicle will travel for one revolution of the engine by dividing the circumference of the tire by the combined gear ratio of the transmission and differential. D c t gr t x gr d.

The following chart of Tire sizes and axle gear ratios are meant to give a general idea of the relationship between the differential gear ratio and the tire size and what effect the ratio has on power output and fuel economy. The chart is based on RPM levels at 65 mph 105 kph and a drive train running at a 11 gearing ratio meaning the. Enter the maximum potential safe engine RPM.

Enter the tire size diameter and the target vehicle speed in MPH. Click Calculate Differential Gear Ratio. The value will be returned in estimated differential gear ratio based on the entered values.

Calculate Rear End Gear Ratio needed. Todays date is 252021 Calculate your Rear End Gear Ratio Needed. Back to Calculators Index.

Gearing for the strip To find the ideal gear ratio for drag racing use your RPM at peak HP. If your max HP is at 6300 RPM use 6300 for. This calculator will provide the speed of the vehicle based on transmission gear ratio engine RPM tire height and the ring gear and pinion gear ratio in the rear end axle differential housing.

This calculator assumes you know the vehicles transmission ratio. Please refer to the Gear Ratio Calculator to determine your rear end axle.