1. Suspension parts usually last a long time, except where accidental damage has occurred. Suspension parts, however, should be inspected from time to time for signs of wear that could lead to loss of precision and ride comfort.
2. Check that the suspension parts are not warped when worn. This can be done by placing the vehicle on a level surface and visually checking that the vehicle is level. Usually the skew will only show up after many miles and will usually show up more on the driver's side.
3. Shift into gear and release the parking brake lever. Grab the steering wheel from above with both hands and pull it back and forth. Listen for squeaks or metallic sounds. Check play. If any of these conditions are found, have an assistant do the rocking to pinpoint the exact location of the source of the sounds.
4. Check the shock absorbers, as they are, as part of the suspension system, the first most likely to be worn out. If there are any signs of fluid leakage, they must be replaced. Rock the car vigorously up and down. Rigidity and good damping of vibrations by shock absorbers should be felt. Once bouncing is stopped, the car should return to its normal position without excessive bouncing up and down. Do not replace shock absorbers one at a time, but rather in pairs, unless failure occurs at low mileage.
5. Check all rubber bushings for wear and splitting. If necessary, replace the rubber parts of the suspension arm.