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A control arm is a bar that has a pivot at both ends. Your car has several, including the upper control arm and the lower control arm, which are arranged to form the letter A. Control arms are part of the suspension system. They attach suspension members to the chassis and manage the motion of the wheels so that it synchronizes with that of the body of the car. They work with bushings, which are cylindrical linings that reduce friction and restrain the auto parts from going every which way. As a result, you are able to go on joy rides without feeling sick and dizzy, as there is control and smoothness in the movement of the car. The two bottom points of the control arms that form the letter A are attached to the frame of the vehicle while the top point is attached to the spindle. Three or four control arms are placed between the rear axle housing and the frame if you have coil springs in both the front and rear suspensions. Like other body parts, the control arms should also be lubricated at every oil inspection. Handling and steering could become erratic if the control arms are malfunctioning and the unsteady movements of your car could take away your riding comfort.
The control arm plays a very important role in every vehicle. Also called as the wishbone or A-arm of the suspension system, the control arm is a flat and roughly triangular sub-frame that pivots in two places. It has got two ends-broad and narrow. While the broad end is attached at the frame and pivots on a bushing, the narrow end is attached to the steering knuckle and is made to pivot on a ball joint.Image Usually four control arms are fitted to the region between the vehicle’s rear axle and frame. The lower control arms allow the suspension setting parts to rotate whenever the car is cornering-resulting in convenient driving pleasure. The control arm also makes the coil springs to respond to the axle and wheel assembly when treading through the bumps and potholes on road. The pivots at the other end of the control arm allow for the up and down motion of the coil springs, helping them to absorb the shocks during bumps. The control arm in your vehicle synchronizes all the four tires to the motion of the vehicle to allow for a smooth and comfortable traveling experience. It also improves steering and reduces the tire wear-out with the less-traction contact surface as the rubber meets the road. In order to fulfil these crucial functions, the control arms are made strong and durable but with regular rut and flex, they do deteriorate. To ensure that the control arms perform properly and allow the suspension system to be in top condition, you must carry regular check ups and replacements if their condition worsens.