![]() ![]() On vehicles after the mid-1950s, ball joints connect the control arms to a steering knuckle assembly which combines the steering knuckle and support into one unit. The steering knuckle is joined to the steering knuckle support by a kingpin. On independent front suspension, a steering knuckle support is located be-tween the upper and lower control arms. The independent suspension system is mounted on coil springs and allows each of the wheels to move independently of the other one. When the driver turns the steering wheel the Pitman arm rotates and transfers the motion through the drag link to the steering knuckle to turn the front wheels. The connection from the steering gear box Pitman arm to the steering knuckle is through a steering rod called the drag link. The steering linkage and thereby the steering knuckles are connected by a single adjustable tie rod. The steering knuckles which contain the spindles are connected to the axle by a kingpin. ![]() On the solid axle the movement of one wheel is dependent on the movement of the other wheel on the axle. The vehicle weight is carried by flat springs or coil springs. The solid axle was used on many early cars and trucks and is still used on many pickups and larger trucks. The type of steering linkage depends on whether the front axle is solid ( I-beam) or independent front suspension (IFS). They convert the rotary motion of the steering wheel into angular motion of the front wheels so the vehicle can be steered to its destination. On rear wheel drive vehicles the steering linkage consists of a number of steering rods that connect the steering gearbox to the front wheels. Skinned Knuckles Magazine, September, 2018 Article from Looking Backward but Moving Forward series,
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