Control arms typically have bushings at their pivot points. Most control arm bushings are made from torsional elastic rubber, or polyurethane. Control arms will wind up when the control arm is not sitting in its normal functioning position. As a control arm drops or climbs, its torsional elastic rubber will wind up - causing the control arm to return to normal position.
Older vehicles use steel control arm bushings, that rotate on threads of the control arm shaft. In these assemblies the steel bushings and shaft tend to wear against each other, and will need to be replaced at the same time.
HOW TO INSTALL 1958 CHEVROLET REAR CONTROL ARM BUSHINGS
INSTALLATION GUIDE OF UPPER CONTROL ARM BUSHINGS IN ARM
See Picture at right
1. Press outer sleeve (B) into control arm (A).
Press sleeves in from each side of the control arm.
2. Lubricate urethane bushing inside and outside with included grease.
3. Slide urethane bushing (C) into sleeve (B)
4. Slide inner sleeve (D) into urethane bushing (C).
5. Each pivot of the upper control arm should be as shown.
INSTALLATION OF BUSHINGS IN AXLE HOUSING (LARGEST DIAMETER)
1. Press each of the preassembled rubber bushings into rear axle housing.
2. Install control arm, hand tighten bolts, lower vehicle to put the weight on the wheels. Torque to proper specifications.
INSTALLATION OF THE LOWER CONTROL ARM BUSHINGS (4 BUSHINGS)
1. Press sleeve (F) into control arm (E). The sleeve will press in from one side, since two different press diameters are used.
Both sides of the control arm should be clean and smooth.
2. Lubricate the urethane bushings (G) inside and outside, slide one in from each side of the arm.
3. Slide the inner tube (H) into the bushings.
4. Assemble each arm, and install - hand tighten bolts, lower vehicle to put the weight on the wheels and torque to proper specifications.