## What is final drive axle ratio?

The final drive ratio is the last bit of gearing between your transmission and the driven wheels. By changing it, you can affect the performance of your car, rather dramatically in some cases. In general, a lower final drive ratio will lead to less torque at the wheels but a higher top speed.

## What should my final drive ratio be?

To find the ideal selection, multiply the final drive ratio by the redline speed in fourth gear (152 mph) and divide that by the top track speed (140 mph). This would yield a theoretical 3.33â€”which is close enough to the nearest available final drive ratio of 3.36:1.

What is final drive?

Definition of final drive : the means for transmitting power from the propeller shaft to the rear axle in an automotive vehicle.

### Is final drive ratio the same as differential?

The final drive ratio is typically the gear ratio for the differential, or the final location where the gearing is altered before being sent to the wheels.

### How is final drive ratio calculated?

By simply dividing the ring gear tooth count by the pinion gear tooth count, the ratio is determined. For example, if we divide a ring gear with 41 teeth by a pinion gear with 10 teeth we find that the gear ratio is 4.10:1 (41/10 = 4.10). Tire diameter will also have an effect on a vehicle’s final drive ratio.

Is higher or lower gear ratio better?

Gear ratios can be boiled down to a single statement: Higher ratios (with a lower numerical value) give better torque/acceleration and lower ratios allow for higher top speeds and better fuel economy. Higher ratios mean the engine has to run faster to achieve a given speed.

## Is a higher axle ratio better?

To summarize: What is axle ratio? It’s a ratio that represents the number of revolutions the driveshaft must make to spin the axle one full turn. The higher the ratio, the higher the performance. The lower the ratio, the higher the fuel economy.

## What is best rear axle ratio?

The most popular rear-end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. For a person who tows more often, and heavier loads, the 3:73 or 4:10 may be more appropriate.

What are the four types of final drives?

Types of Final drive

• Spur gears in Types of Final Drive.
• Helical Gears in Types of Final Drive.
• Bevel gears in Types of Final Drive.
• Worm gears in Types of Final Drive.

### Is Final drive a differential?

The final drive is a gear train that further reduces the speed of the gearbox output shaft to adapt it to the traction wheels; this gear train is usually inte- grated with a differential mechanism.