final drive ratio calculator
The higher the RGP ratio the lower the top end speed but faster acceleration and more pulling power. Final Drive Ratio Definition.
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Spur Pinion Trans.

. Fill in all entries except the one you want an answer to in green section. How can I calculate the final drive ratio of my Silverado. Save yourself the headache and let us figure out your ring-and-pinion gear ratio.
A final drive ratio is defined as the final ratio between the engine. Remember the yellow section crawl ratio is only for output only do not type anything in this box. The five speed option is for the last gear of a transmission greater than four speeds.
Installation of the correct ring and pinion gear ratio will help optimize performance fuel economy and overall driveability. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. With this transmissions First gear ratio of 274 combined with a 373 axle ratio the final drive ratio yields a 1022 274 x 373 1022.
The lower the number the more top end it will have. The same is true of the transmission final gear ratio. The final drive ratio is how many turns the driveshaft or output shaft from the transmission makes in relation to how many turns the wheels make.
Enter Your Own Numbers Aisin AR5 Aisin AS69RC Aisin D478 Aisin Warner AW30-40 Aisin Warner AW4 Aisin Warner AX-4 Aisin Warner AX-5 Aisin Warner AX-15 Allison 545 4 speed. Clicking on the Transmission or TransferCase links will jump to bottom of this. If it doesnt make that much.
Hence this ratio is known as the final drive ratio. TCR is the transfer case ratio. Use redline RPM to figure top speed for each gear.
Wheeltire combinations - revolutions per mile. If youd like to find your overall crawl ratio enter the DiffTransTransfCase ratios. For example if the ring gear has 30 teeth and the pinion has 10 take the number 30 and divide by 10 to get the ratio of 31.
Use this calculator to determine your gear ratio and vehicles speed in any gear and any engine RPM for best performance. Ring-and-pinion selection made easy. Or change input variables engine RPM axle gear ratio and tire height to determine vehicle speed in each forward gear.
Airboat Prop Speed Calculator. Tire Diameter in ex. 45 Calculated using a 11 final drive ratio No Overdrive News Events.
Calculation for establishing vehicle speed for different final drives. 2429 Mercantile Drive Suite A Rancho Cordova CA 95742. This is because in reality top speed is physically limited in one of two ways either by being geared relatively low or by aerodynamic drag.
Note that you will get ridiculous speeds for overdrive gears. Final Drive Ratio Formula. 1 wheel rotation 375 pinion rotations x 378 3781 ratio of the 1st gear in this case Therefore 1 wheel rotation 14175 engine rotations in 1st gear Thats why the vehicles can climb the slopes easily in the first gear than other gears.
Keep in mind that our calculator does NOT take into account drive train loss road and weather conditions or the skill of the driver. TR is the transmission gear ratio. Need of the Final Drive in an automobile.
List the final parameters for the gear ratio calculation. The following formula is used to calculate the final drive ratio of a car. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size.
Just enter the data in the white boxes below then click the Calculate Button. Scroll through the list of popular transmissions to find yours. The straightforward way to calculate the Final Drive Ratio is to divide the number of teeth on the ring gear by the number of teeth on the pinion gear.
The primary drive ratio and overall ratios for each gear are all calculated. Use the horsepower calculator to find out how much power a car would require at a given speed. ------ MFactory ------ MFactory PRO Series Gear Set 405 FD 92-95 Civic Si 49 Final Drive 92-95 Civic Si 156512501000 Gear Set 92-00 EG6EK4EK9 4928 Final Drive 92-00 EG6EK4EK9 169513841000 Gear Set 94-00 Integra GSR 4928 Final Drive.
It originally came with 373 gears and 245 75R 16 tires and I want to find out what the final drive ratio was before I installed the 285 75R 16s Goodyears that I now have on it. By making changes to your spur and pinion gears you can influence your cars speed of acceleration and top end speed. DR AR TR TCR.
So a 3501 final drive ratio means three and a half turns of the driveshaft for every turn of the wheels. The second calculator allows you to actually input any EXACT transmission final gear ratio. The final drive gear is separate from the transmission usually located in the differential.
FD Final drivediff ratio x wheel rev per mile. Input your stock and new tires sizes along with your original gear ratio. To figure out the final drive number do the math.
A formula is all I really need. For the Tire Height field enter your tire. Calculate RPM for Given SpeedMPH Rear Gear Ratio and Trans Gear Ratio.
The smallest error is for the gear ratio of 3462 therefore its going to be chosen for the vehicle as a design parameter. Where DR is the drive ratio ratio 1 AR is the axle ratio. This program calculates the gear ratios of a motorcycle.
The larger the final drive number the faster the acceleration. With our RPM calculator you can calculate your engines RPM based off of your vehicles speed tire diameter rear gear ratio and transmission gear ratio. Pressing the Reset button loads the.
Select transmission from the drop down list or if its not in the list and you know the gear ratios of your transmission enter them below. Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your vehicle. Calculate the relative error of the final gear ratios 3455 and 3462 compared with the initial value of 3472 using equation 12.
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