Control arms

The foundation of your front suspension system are the control arms. They can be thought of as the link connecting your car’s front wheels to its body. The wheel assembly is connected to one end, while the car’s frame is connected to the other.

The front wheel’s highest and lowermost portions are connected by the upper control arm, while the lower control arm is connected by the lowermost portion of the wheel. Both arms are then connected to the car’s frame. The layout is the same if your rear suspension is independent.

How does the control arm work?

A. Two arm bushes join each arm to the car’s frame. The control arms can move up and down thanks to these bushes.

B. A steel spindle is connected to the control arm’s other end. The front wheel is fastened to the spindle via bolts. The spindle is connected to the upper and lower control of cars without struts using a ball joint.

C. A thick steel coil spring that supports the weight of your car and acts as a shock absorber is positioned in a spring socket between the control arm and the vehicle frame.

Some arms have movable attachment points at the frame to guarantee that the control arms, bushings, and ball joints are perfectly aligned. When required, a mechanic can correct the front end of your vehicle to keep it moving straight.

Credits: MOOG

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