Here are some simple tests to diagnose suspension problems:
- Check all of the mounting nuts and bolts to be sure the problem isn’t being caused by looseness.
- Inspect any visible parts such as bushings, ball joints, and steering linkages. If you see any damage it will need to be serviced or replaced.
- Shake the steering wheel quickly, turning it left and right ninety degrees. There should be no excessive free play or knocking noises. If the car has power steering, do this with the engine running. Check rack and pinion as well as associated parts. If any of them are damaged, the part needs to be replaced.
- When raising the vehicle, use a lift or jacks approved for the weight of the vehicle.