A car shaking when going over 70 mph can be a frightening experience, especially if you’re not sure what’s causing it. Luckily, there are several common causes that can be addressed, and in most cases, the problem is not a serious safety hazard. This article will cover the most frequent causes of a car shaking at high speeds, providing you with the knowledge to diagnose and fix the issue.
What Causes a Car to Shake at 70 MPH?
There are a few common culprits behind a car shaking at 70 mph:
1. Wheel Imbalance
This is the most common cause of car shakes, particularly at highway speeds. When your wheels aren’t perfectly balanced, it creates vibrations that can be felt throughout the car, especially at higher speeds. These vibrations can get worse as you accelerate, leading to a noticeable shake in the steering wheel.
Expert Tip: “Think of a wheel like a spinning top. If it’s perfectly balanced, it’ll spin smoothly. But if it’s out of balance, it’ll wobble and shake.” – John Smith, Certified Mechanic
2. Wheel Alignment
Incorrect wheel alignment can also cause shaking, especially at higher speeds. When your wheels are out of alignment, they’re not pointing in the same direction, which can lead to uneven tire wear and steering problems. This can also cause the car to pull to one side or shake, especially when you’re going straight.
3. Tire Problems
A damaged tire or uneven tire wear can contribute to shaking. For instance, a tire with a flat spot or a tire that’s significantly worn on one side can create an uneven force on the wheel, resulting in shaking.
4. Suspension Issues
The suspension is the system that absorbs the bumps and dips in the road. Faulty suspension components can cause the car to shake at high speeds, particularly if the shocks or struts are worn out. A worn shock will allow the suspension to oscillate, causing a noticeable shake.
5. Brakes
Warped brake rotors are another common culprit for shaking at high speeds. This happens when the rotor is heated unevenly, causing it to warp out of shape. Warped rotors can cause a pulsing sensation in the brake pedal and shaking in the steering wheel.
6. Drivetrain Problems
In rare cases, a car shake at high speeds can be caused by a problem in the drivetrain. This could be a faulty driveshaft, a worn universal joint, or even a problem with the transmission. If you suspect a drivetrain problem, it’s essential to take your car to a mechanic for diagnosis.
How to Diagnose the Cause of the Shake
If your car shakes at 70 mph, it’s important to diagnose the cause to ensure the correct repair. Here’s what you can do:
- Start with a visual inspection: Check for any obvious signs of damage, like a flat tire, a loose wheel, or a worn tire.
- Listen to the sound: Does the shaking coincide with any unusual noises? A grinding noise could indicate brake problems, while a clunking sound might point to a suspension issue.
- Test the brakes: Apply the brakes gently and see if the shaking intensifies or goes away. This could help you determine if warped rotors are the culprit.
- Check the tire pressure: Low tire pressure can also cause a car to shake, so ensure all your tires are properly inflated.
Tips for Preventing Shaking
Here are a few tips to help you prevent your car from shaking:
- Regular maintenance: Routine maintenance like tire rotations, wheel alignments, and brake inspections can help catch potential problems early on.
- Proper tire inflation: Maintain the correct tire pressure as specified in your owner’s manual.
- Avoid harsh driving: Avoid sudden acceleration and braking, as this can put extra stress on your suspension and tires.
When to See a Mechanic
If you’ve checked for common causes and are still experiencing a shake, it’s time to consult a mechanic. A mechanic can use specialized tools to diagnose the issue and perform the necessary repairs.
Conclusion
A car shaking at 70 mph can be disconcerting, but it’s important to remember that it’s often a fixable problem. By understanding the potential causes and following the steps outlined above, you can diagnose and address the issue effectively. Remember to stay informed and invest in regular maintenance to keep your car running smoothly and safely.
Car shaking at 70 mph
FAQ
Q: Is it dangerous to drive a car that shakes at 70 mph?
A: While not always dangerous, a shake can indicate a potential problem, and ignoring it could lead to more serious issues down the line.
Q: Can I drive a car with a wheel imbalance or wheel alignment issue?
A: You can, but it’s not recommended. These issues will cause premature tire wear and could eventually lead to more serious problems.
Q: How much does it cost to fix a car shake at 70 mph?
A: The cost varies depending on the cause of the shake and the severity of the problem. It could range from a few hundred dollars to a few thousand dollars.
Q: How often should I get my wheels balanced and aligned?
A: It’s generally recommended to have your wheels balanced and aligned every 6,000 to 12,000 miles, or more often if you notice any shaking or unusual tire wear.
Need Help with Your Car Shake?
If you need help diagnosing or fixing a car shake, don’t hesitate to reach out! Our expert mechanics are here to help you get back on the road safely and confidently.
Contact us today!
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