What Does 3.73 Gears Mean

What Does 3.73 Gears Mean: Everything You Need to Know

Car enthusiasts and mechanics alike understand that gears play a vital role in a vehicle’s performance. When discussing gears, 3.73 is a term that is often used, but not everyone understands what it means. In this article, we will delve into the meaning of 3.73 gears and how it impacts your car’s overall performance.

What are gears?

To begin with, let’s define gears. Gears are mechanical components in a vehicle’s transmission system that transmit power from the engine to the wheels. They work by increasing or decreasing the rotational speed (or torque) of the engine output shaft, which in turn powers the wheels. Gears also alter the amount of force (or effort) required to turn the wheels, making them an essential part of a car’s performance.

What does 3.73 gears mean?

Now that we have a basic understanding of gears let’s discuss 3.73 gears in more detail. 3.73 refers to the gear ratio in the car’s rear axle. A gear ratio is the relationship between the number of teeth on two mating gears. It represents how many times the input shaft must turn to rotate the output shaft by one full revolution.

In the case of 3.73 gears, the input gear needs to turn 3.73 times to rotate the output gear once. This means that the engine has to turn more revolutions to rotate the wheels once, providing more torque to the wheels. The higher the numerical value of the gear ratio, the greater the torque multiplication effect and the faster acceleration the car will achieve.

Why is the gear ratio important?

The gear ratio can have a significant impact on your vehicle’s performance. A low gear ratio implies that the input output turns fewer times to rotate the output gear once. This translates to less torque multiplication but provides excellent fuel economy and low-speed torque. It is suitable for driving in off-road conditions or towing heavy loads.

In contrast, a high gear ratio implies more torque multiplication but lower fuel economy and top speed. It is ideal for high-performance driving, as it provides faster acceleration and top speed.

When to consider 3.73 gears?

Before deciding on 3.73 gears, you need to understand your vehicle’s current gear ratio and the type of driving you will be doing. A rule of thumb is that vehicles with large tires tend to require lower gear ratios because of the additional rolling resistance. If you are looking for a faster acceleration and top speed, 3.73 gears might be the right choice for you.

On the other hand, if you are a frequent off-roader or haul heavy loads, you may want to consider a lower gear ratio. This will provide better fuel economy, low-speed torque, and allow your vehicle to climb steep hills or rock crawl more efficiently.

Installation of 3.73 Gears

Installing 3.73 gears involves removing the existing gear set and replacing it with the new 3.73 gear set. Installation should be done by a certified mechanic or professional as it requires specialized tools and knowledge. The installation process can improve your vehicle’s performance significantly, but any mishap in the installation can cause irreversible damage to the gearbox and other parts.


In conclusion, 3.73 gears refer to the gear ratio in your rear axle. It is essential to understand your vehicle’s gear ratio before deciding on upgrading to 3.73 gears or any other gear ratio. Whether you are a high-performance driver or an off-roading enthusiast, the correct gear ratio makes all the difference. Remember to have a licensed technician install the gears, and you’ll be on your way to achieving great performance for your car.