What is a final drive?

25.03.2022

The purpose of the final drive gear assembly is to provide the final stage of gear reduction to decrease RPM and increase rotational torque. Typical final drive ratios can be between 3:1 and 4.5:1. It is because of this that the wheels never spin as fast as the engine (in almost all applications) even when the transmission is in an overdrive gear. The final drive assembly is connected to the differential.

In FWD (front-wheel drive) applications, the final drive and differential assembly are located inside the transmission/transaxle case. In a typical RWD (rear-wheel drive) application with the engine and transmission mounted in the front, the final drive and differential assembly sit in the rear of the vehicle and receive rotational torque from the transmission through a drive shaft. In RWD applications the final drive assembly receives input at a 90° angle to the drive wheels. The final drive assembly must account for this to drive the rear wheels. The purpose of the differential is to allow one input to drive 2 wheels as well as allow those driven wheels to rotate at different speeds as a vehicle goes around a corner.

You’ll find the best final drives on our site track-motor.com

Recommended

29.03.2024
Hydraulic Fluid Contamination – What You Need to Know?
In a variety of industrial settings, hydraulic systems play a pivotal role by energizing machinery a...
Read
18.03.2024
How to connect final drive
When we buy a new hydraulic motor for our excavator, we need to connect it to the rest of the [&hell...
Read
18.03.2024
Final drive maintenance – important information
I don’t think anyone needs to be convinced that repairing an excavator’s final drive is...
Read
25.08.2023
The most popular excavator brands on the market
The excavator market is full of high-quality equipment made by renowned manufacturers. Many of them...
Read
06.03.2023
Final drive – how to measure it?
Although off-the-shelf travel motors generally have the appropriate labels to match a particular exc...
Read
27.02.2023
Final drive troubleshooting – 8 common issues
Drive motors are undoubtedly one of the most important elements in tracked machines – their fa...
Read