When Replacing A Control Arm Keep In Mind:
- The number of control arm types vary from vehicle to vehicle depending on the design of the vehicle suspension.
- Control arms should be replaced in pairs arms on both sides of a front or rear axle if the reason for replacement is worn control arm bushings or a worn ball joint.
- All other suspension components should be inspected when control arms are replaced because looseness, damage, or excessive wear in other parts of the suspension system will make it impossible to perform a wheel alignment after the control arms are replaced.
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How Is A Control Arm Replaced
A technician will replace a lower control arm by first lifting and supporting the vehicle in the air on a hoist and removing the wheel and tire. A lower control arm must be disconnected from the lower ball joint and from the vehicle frame or body. An upper control arm is disconnected from the strut tower on the body and from the top of the steering knuckle. Some control arms come with bushings permanently installed in them, while others require the bushings to be installed. It is common to replace related components – ball joints, tie rod ends, sway bar links – at the same time that a control arm is replaced.
Is It Safe To Drive With A Control Arm Problem
No. If the car wanders on the road, pulls to one side, or noise from the suspension is loud, you need to schedule repair right away. Should the problem be limited to low levels of noise, such as clunking or squeaking, continued use of the car is reasonable until you can schedule a repair. Should the control arms be damaged as a result of a collision, it would be unsafe to drive the car until it is repaired.
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Rear Suspension For 2014 Jeep Patriot
Vehicle
Patriot. 4wd. Compass. 4wd. With awd. Caliber.
4wd. Caliber. Compass. Patriot. 2wd.
2wd, with off road pkg. Patriot. With off road package. 4wd, with off road pkg.
Compass. All. Patriot. Without off road package. 4wd, without off road pkg. Caliber. 2wd.
Lower Control Arm Bolt, Left
Awd. 4wd. Fwd. 2007-11. 2wd, outer. Without heavy duty.
Lower Control Arm Bolt, Right
2wd, inner. 4wd, inner.
Lower Control Arm Nut
4wd. Without awd. 2wd. 2008. Sedan,. Convertible,. Link rod,nut. Awd control arms. Fwd control arms. FWD. nut.
4wd. Caliber. Compass. Patriot. 2wd.
4wd. 2wd. Rear. 3.8L. 2.0L, m8x20. Without 2.4L turbo. 3.0L diesel. 3.6L.
4wd. Caliber. Compass. Patriot. 2wd.
Discontinued
Patriot. With off road package. Left. 4wd, with off road pkg. 2wd. 4wd, all. Compass.
Caliber. Right. Patriot. Without off road package. Compass. 2wd. 4wd.
Caliber. Left. Patriot. Without off road package. Compass. All. 4wd.
Without awd. Caliber. Patriot. 2wd. Compass.
Lower Control Arm Bolt, Left
2wd, inner. 4wd, inner.
Lower Control Arm Nut, Right
4wd. Without awd. 2wd. 2008. Sedan,. Convertible,. Link rod,nut. Awd control arms. Fwd control arms. FWD. nut.
Can I Drive With A Control Arm Problem
If the control arm on a vehicle is damaged in a crash or impact with a pothole or parking block, the suspension will be out of alignment and cause uneven tire wear and poor vehicle handling. The control arm should be replaced as soon as possible. If the control arm bushings are worn, the result will be an annoying squeak when the car goes over bumps. In this case, the car can be driven. But if the bushings wear out considerably, metal-on-metal contact may happen between the control arm and the bushing bracket. This can cause further suspension damage and the control arm or bushing should be replaced.
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Can I Replace The Control Arm Myself
Replacement of a control arm is generally an intermediate DIY repair. On some vehicles, the control arms come with the bushings already installed. On other vehicles, the bushings need to be pressed into their housings on the control arm before installation into the vehicle. In this case, the repair will be more difficult. Also, this repair requires that the vehicle be safely lifted and supported with a jack and jack stands. Failure to do so in a safe manner can result in serious injury or death.
Steering Wheel Is Vibrating
So, heres something you hopefully already knew. Your steering wheel isnt supposed to vibrate. If your steering wheel is vibrating, theres something going on that shouldnt be going on.If your cars front lower control arm is busted, then the vibrations of the steering system will start to make their way back into your car. And theyll come through the steering wheel. Next thing you know, your steering wheel will be jiggling around like a skateboard on a gravel road. Its annoying. And it kind of tickles. And it will only get worse.
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Jeep Patriot Suspension Control Arm And Ball Joint Assembly
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When To Consider Replacing A Control Arm:
The structural portion of the control arm can last the life of the vehicle except for cases of corrosion or crash damage. However, the rubber bushings and the ball joint in a control arm have a limited life. A mechanic should investigate if you notice:
- Wheel alignment difficulties. Should the bushings, or the ball joint, in a control arm be worn, it will be impossible to properly align the vehicle. The worn components, or the entire arm, must be replaced.
- Vehicle wont track straight or pulls to one side. A car will not track straight and may require constant steering correction if there is a worn, bent, or loose control arm.
- Clunking or squeaking noise. A loose control arm, or a control arm with dried out, rotted, or loose bushings, may move enough to cause detectable noise from the suspension as you go over bumps in the road.
- Vehicle pulls to one side only when braking. Worn bushings or ball joints can allow control arm to shift when braking, causing the vehicle to pull to one side. Although, this could also be caused by brake calipers.
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What Is A Control Arm
The control arm connects the steering knuckle to the frame or body of a vehicle. The wheel is held on to a hub connected to the steering knuckle. The knuckle allows the wheel to steer left and right and is attached to the control arm. The control arm allows allow the wheel to travel up and down over bumps and helps to position the wheel in the proper alignment.
What To Look Out For When Dealing With Control Arm Issues
If a control arm is damaged, the suspension alignment will be compromised. In addition, rubber bushings are adversely affected by heat and by petroleum products . It is important to periodically inspect the control arm bushings to make sure they are free from grease or oil. Also, in order to replace a control arm, the vehicle needs to be safely raised and supported on a hoist or a jack and jack stands.
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How Are Control Arm Issues Diagnosed
A technician may diagnose a worn lower control arm during a test drive of the vehicle. The condition may also present itself during a bounce test, where the technician will press down firmly on one corner of the vehicle to bounce the suspension and pivot the control arms. A damaged or bent control arm may show up during a four wheel suspension alignment since the control arm determines the position and angle of the wheel.
How Does The Control Arm Work
The control arm is connected on one end to the steering knuckle by a ball and socket called a ball joint. It is attached at the other end to the vehicle frame or body. When a car goes over a bump, the control arm pivots up and down with the wheel and allows the vehicle body to remain stable. On the frame/body side, the control arm has a bushing that allows it to pivot.
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How Do Mechanics Replace A Control Arm
- The vehicle is raised and supported on steel jack stands, and the wheel and tire assembly is removed.
- Stabilizer bar links are detached from the control arm, if applicable. ABS wiring to the wheel speed sensor, if routed along the arm, is disconnected.
- Control arm mounting bolts are detached from the frame and from the axle carrier if the control arm is in the rear.
- For front control arms connected to the steering knuckle via a ball joint, the nut is removed from the ball joint stud and the stud is pushed through the steering knuckle to free the arm.
- The arm is lowered from the vehicle and examined by the mechanic to confirm that the noise, or other problem, actually originated from a defect in the arm.
- The new arm is installed using new mounting bolts if required by the service manual. In many cases, the fasteners must be tightened with the vehicle weight on the suspension in order to ensure the bushings are in a neutral, or resting, position.
- The vehicle is lowered and road tested to confirm the problem is resolved. Replacing a control arm will change the vehicle alignment settings and the mechanic will refer you to a professional alignment shop to have the vehicle alignment set to factory specifications.
What Are The Symptoms Related To A Bad Control Arm
The actual control arm may last the lifetime of the vehicle. The control arm bushings, on the other hand, often wear out as a vehicle approaches 100k miles. A control arm is prone to damage if the vehicle is in a crash or encounters a large pothole. If the bushings are worn out, the suspension will make a squeaking sound when going over bumps. If they are severely worn, a knocking sound may be heard as the control arm makes metal-to-metal contact with the bushing bracket. If the control arm is damaged or bent, tire wear may be uneven and the vehicle may pull to one side or wander.
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What Is A Control Arm And How Does It Work
A control arm is a suspension component, usually made of heavy gauge steel or aluminum, that links the steering knuckle in the front or axle carrier in the rear to the frame of the vehicle. Many vehicles have upper and lower control arms. The inboard link of the arm securely bolt to the frame of the vehicle through rubber bushings, while the outboard link of the control arm connects to the steering knuckle through a ball joint all of which allow the control of the up and down movement of the steering knuckle or axle carrier. This minimizes the transmission of shock and vibration to the vehicles body.
Jeep Patriot Front Lower Control Arm/wishbone: More Information
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Uneven Wear On Your Tires
Like I just said, a dying front lower control arm can cause your wheels to be improperly aligned. In addition to creating pulling, that will lead to your car having uneven wear on the tires. Always keep an eye out for irregularities with your tires. Spotting things like uneven wear can save you a lot of money, and keep your car as safe as possible.
