Identifying and Fixing the Cause of Car Wheel Wobble During Braking or Acceleration

Have you ever experienced a car wheel wobbling or shimmying when braking or accelerating? This can be a frustrating and potentially dangerous issue, but rest assured, identifying the root cause is the first step to a permanent solution. Here, we explore two common causes of such issues and provide practical solutions to fix them.

The Role of Rotor Disc Thickness and Lateral Runout

Brakes can be a significant cause of car wheel wobble. In one instance, the problem was due to rotor disc thickness variation caused by excessive lateral runout. Lateral runout is the measure of how much the edge of the disc varies from parallel with the hub of the wheel. When this disc thickness is not uniform, it can cause the wheel to wobble or shimmy, especially during braking. However, simply replacing the rotors with new ones will likely not solve the underlying issue, as the wobble could resurface within 3000 to 5000 miles.

Signs and Symptoms of Excessive Lateral Runout

If you experience the following during braking or driving at high speeds, abnormal lateral runout could be the culprit:

Uneven wear on the tires Wheel vibrations Shimmying at certain speeds

Exploring Tie Rod Ends and Lower Control Arm Bushings

Another potential cause of car wheel wobble is related to the steering and suspension system. In one case, the problem was identified as bad tie rod ends inner or outer, or worn or damaged lower control arm bushings. These components are crucial for maintaining proper wheel alignment and stability. If they are not functioning correctly, it can lead to a wobbling or shimmying effect.

How to Identify Worn Tie Rod Ends or Lower Control Arm Bushings

Here are some signs that might indicate these issues:

Unusual noises during steering or driving Uneven tire wear Difficulty in moving the steering wheel without any input

Accelerator-Related Issues: Inner CV Joints

Acceleration can also pose its own set of challenges when it comes to car wheel wobbling. In another instance, the problem was due to worn inner CV joints. Constantly bending and straightening under acceleration puts a lot of stress on the CV joints, and if they are worn, it can cause the wheels to wobble or shimmy.

Signs and Symptoms of Worn Inner CV Joints

Look out for these signals if you suspect issues with your CV joints:

Clicking or creaking sounds during acceleration Wobbly steering inputs during acceleration Uneven wear on the tires, especially on the outside

Expert Recommendations and Preventive Measures

If you experience any of the above issues, it is crucial to take your car to a professional mechanic for a thorough inspection. Regular maintenance and inspection can help identify and address these issues before they become more serious. Some practical steps include:

Regular brake and rotor checks to ensure no lateral runout Inspection of tie rod ends and lower control arm bushings for signs of wear or damage Inspecting CV joints for any unusual noises or signs of wear

By understanding the common causes of car wheel wobbling and shimmying during braking or acceleration, and taking preventive measures, you can ensure the safety and longevity of your vehicle.