FAQs—Chevrolet P30 Series
It's the first time that I've encountered steering wheel shimmy when driving a Chevrolet P30 Series. Even when I drive this vehicle at constant speed and try to be steady, what worries me is that the steering wheel still wobbles side-to-side. I've also noticed that the vibration becomes worse when I drive the vehicle on a rough road surface or when I encounter speed bumps or potholes. What should be done to fix this?
This problem can't be isolated to a steering system issue. The steering wheel shimmy and vibration may also be blamed on uneven tire pressure. Another thing to consider here are wheel and tire assemblies that are already out of balance. In which case, they should be adjusted accordingly. While at it, check any sign of damage or wear on tires. Also take time to inspect other suspension parts. This steering wheel problem may also be traced to a loose part in the steering linkage. Go check the linkage to see if anything needs to be sealed or re-tightened. Don't ignore the steering wheel vibration and shimmy.
I've noticed some feathered wear on the tires. What causes this type of wear? How can this be fixed?
The edge of the tread ribs may create a small rounded edge on one side and a sharp edge on the other side. This wear pattern is known as feathering. You can't easily spot the sharp edges. You can gauge this better by touching the edges of the tires. Feathering happens when the toe-in setting is incorrect. In which case, the toe-in should be adjusted properly or set according to manufacturer specification. However, even if the toe-in is set appropriately, sometimes, this wear pattern may still develop. When this occurs, the things to blame are worn-out bushings in the front suspension. This will have an effect on wheel alignment. The shift could happen as the vehicle runs.
I hear some noises whenever I turn the vehicle around a corner. The noises can best be described as knocking, squeaking, and sometimes clunking. I can't say that steering is messed up. However, the noises are quite alarming. It seems to be getting louder over time. What can be the real trouble here? I need some clues.
If you hear clunking or squeaking when cornering, then this isn't something you can just ignore even if steering the vehicle doesn't seem to be a problem. You'll have to look into different things to determine the real cause or source of the strange noises. The steering gear, for instance, may lack lubrication or may require some repair. It could also be that parts of the steering linkage need re-tightening. Inspect the linkage for any sign of wear or damage. These noises may come from parts that hit against one another. The tires, for example, may be grinding against something. Some parts of the suspension may also be hitting other components. See if there are worn-out components in the suspension and if these are causing the problem.