What is the final drive in a transmission?
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.
How does the final drive work?
The Final Drive is the last gearing used while transmitting the engine power to the wheels. It has two purposes. Firstly, it turns the power flow at the right angle from the propeller shaft to the rear axle. The pinion gets the drive from the engine while the crown-wheel is attached to the wheels and rotates them.
What is the necessity of final drive?
A final drive is that part of a power transmission system between the drive shaft and the differential. Its function is to change the direction of the power transmitted by the drive shaft through 90 degrees to the driving axles. At the same time.
What does final drive mean?
: the means for transmitting power from the propeller shaft to the rear axle in an automotive vehicle.
What should my final drive ratio be?
For most street performance applications, a 10:1 final First gear ratio is usually considered optimal. The disadvantage of operating a 4.10:1 axle ratio on the street with a 1:1 high gear is excessive freeway engine speed.
Why do lower gears have more torque?
A Gear train is capable of switching a given power between torque and speed. So, while starting from rest, a low gear is used. This essentially means that number of tooth on the drive gear are less than those on the driven gear. Hence, a higher torque is achieved by trading-off the speed of the vehicle.
When do you Know Your final drive has a problem?
If water vaporizes the instant it touches your final drive, then you have a problem on your hands. It’s not necessarily the final drive, though. It could be that the hydraulic fluid is too hot. On the other hand, it could be something about to cause more damage, like a brake that won’t completely release, worn out bearings, or not enough gear oil.
When to take care of your final drive?
Don’t neglect the maintenance on your final drive until it’s died! Check and change the gear oil, address leaks as soon as you can, and don’t ignore symptoms like excessive noise or overheating. And don’t neglect the case drain filter until enough pressure builds up to blow the cover plate off.
Why do I need to change my final drive?
If you have an OEM final drive, you probably want to increase reliability and lifetime. If you already have a motorsport final drive, you probably want to create the perfect gearing for your car and track. Both reasons are highlighted below.
What happens if final drive is not lubricated?
In fact, the image above shows what happens to a final drive when the bearings aren’t replaced–catastrophic failure. Running a final drive that is low on gear oil will damage it – contrary to what many people may believe. A common belief is that as long as the gears are lubricated everything will be fine.