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In automotive suspension, a Steering Knuckle or upright is that part which contains the wheel hub or spindle, and attaches to the suspension and steering components. The terms spindle and hub are sometimes used interchangeably with steering knuckle, but refer to different parts.
The wheel and tire assembly attach to the hub or spindle of the knuckle where the tire/wheel rotates while being held in a stable plane of motion by the knuckle/suspension assembly.
In the attached photograph of a double-wishbone suspension, the knuckle is shown attached to the upper control arm at the top and the lower control arm at the bottom. The wheel assembly is shown attached to the knuckle at its center point. Note the arm of the knuckle that sticks out, to which the steering mechanism attaches to turn the knuckle and wheel assembly.
What is a Steering Knuckle?
The Steering Knuckle, also known as the steering knuckle spindle, is a crucial component of the steering system that connects the steering linkage to the front wheel, allowing the driver to control the direction of the vehicle freely.
The Function of the Steering Knuckle
The steering knuckle is primarily responsible for transmitting the motion from the steering linkage to the front wheel, allowing the driver to have control over the car's direction. Additionally, it also helps to keep the front wheels aligned and in the correct position. This is essential for ensuring proper tire wear and a safer driving experience.
Where is the Steering Knuckle located in a car?
The steering knuckle is located at the bottom of the front wheel assembly. It connects to the axle via a wheel hub and to the steering linkage via the steering arm. It also connects to the braking system and may have a support for the brake disc.
What happens when the car's steering knuckle has a malfunction?
A malfunctioning steering knuckle in a car can cause serious problems and compromise the safety of passengers and the driver. The reason for this is that when the steering knuckle is severely damaged, the driver will have difficulty turning the steering wheel and may lose complete control over the direction of the vehicle, which can be extremely dangerous, especially at high speeds.
Symptoms of a steering knuckle malfunction
♦ Vibrations in the steering wheel
♦ Suspension noise
♦ Abnormal tire wear
♦ Alignment problems
♦ Difficulty turning the steering wheel
How to replace a car's steering knuckle?
Replacing the steering knuckle requires a certain level of expertise in vehicle mechanics. The following steps can be taken to replace your steering knuckle:
- Lift the vehicle: The first thing you need to do is to lift the vehicle using a hydraulic jack and secure it with jack stands.
- Remove the wheel: Next, remove the front wheel on the side where you want to replace the steering knuckle.
- Remove the steering knuckle: Now, you can remove the steering knuckle from the vehicle. To do this, you need to loosen the steering knuckle nuts and separate it from the steering ball joint using an appropriate tool.
- Replace the steering knuckle: Once you have removed the old steering knuckle, install the new steering knuckle in its place and connect it to the steering ball joint.
- Reinstall the wheel: After installing the new steering knuckle, reinstall the front wheel and tighten the wheel nuts.
- Lower the vehicle: Finally, test the new steering knuckle in a safe area.
Keep in mind that the steps to replace the steering knuckle may vary depending on the car model and the brand of the steering knuckle. So it is advisable to follow the detailed instructions of the vehicle and steering knuckle manufacturers, or you can seek the help of a qualified mechanic if you have no idea how to replace the steering knuckle on your own.
How much does a Steering Knuckle Cost?
Generally, the price of the steering knuckle itself ranges from $50 to $200 dollars, depending on the car model. Additionally, there may be additional fees, such as the cost of labor and any other parts or components that need to be replaced at the same time.
How much does it cost to Replace a Car's Steering Knuckle?
The cost of replacing the steering knuckle can vary depending on the vehicle model, geographic location, and the mechanic shop performing the work.
The total cost of replacing the steering knuckle ranges from $300 to $800 dollars on average. However, this is just a general estimate, and the actual cost can differ significantly depending on individual circumstances. It is best to contact a reliable mechanic shop to obtain an accurate and detailed quote.
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SUSPENSION SYSTEM
STEERING SYSTEM
BRAKE SYSTEM
ENGINE SYSTEM
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