What Causes my Car to Shake over 70 mph | 6 Reasons To Learn

What causes my car to shake over 70 mph? This is a common occurrence for some drivers when driving. When a vehicle shakes, it may make you feel uneasy. Every motorist needs a certain ease and comfort level to guarantee safe driving.

As a result, anytime your automobile vibrates, you should analyze and correct the issue as soon as possible. When traveling beyond 70 mph, the car shakes for various causes.

Out-of-balance wheels, a malfunctioning braking system, a starving engine, unequal tire degradation, and so on are examples of this. There are several causes why this may occur, and we’ll go through them in today’s article.

What Causes my Car to Shake over 70 mph?

Any driver will find a shaky car uncomfortable. Some signs are so faint that they are only evident at speeds beyond 70 miles per hour. Unlike other wear-and-tear automotive problems, Vibration difficulties may affect both old and new cars.

And it’s possible that this is not due to carelessness or misuse. Shaking and wobbling usually originate from the steering wheel or brake pedal and, if left unchecked, will worsen over time.

Parts that have worn out and malfunctioning air-fuel systems are other prevalent causes. Whatever the source, it is preferable to address the problem as soon as possible before it worsens.

Here are some of the most typical reasons why an automobile shakes while traveling at speeds over 70 mph:

Tires that are out of balance

Vehicles with unbalanced tires shake more at more incredible velocity (between 50 and 70 mph). This also results in a cupped or jagged worn pattern on the surface.

One part of these tires is bulkier than another. Out-of-balance tires are caused by hitting pits, bridge joists, and ledges. This may cause a wheel load to be knocked off, a sidewall bubble to form, or a rim to be dented. The damage to the tire causes shaking in the steering wheel and the seat and flooring.

Vibrations experienced in the steering column indicate affected frontal tires, but vibrations felt in the seating or floor imply affected rear tires. Tire rebalancing should not be done at home. This procedure necessitates using a digital wheel analyzer to assess the mismatch and the extra weights required to remedy the issue.

Wheels that aren’t aligned

Unaligned wheels, which may occur due to striking a pothole, are another common cause of vehicle shaking above 70 mph. This problem would be solved by wheel alignment, which includes the degree to which the tires touch the road.

Beyond the shaking difficulties and repair work, however, some factors may signal the necessity for a wheel alignment, such as the following:

• Tire wear that is uneven, severe, or occurs quickly
• When going straight, the steering column sways to one side.
• Steering is clunky.
• Sliding to the right or left regularly
• Tires that squeal
• Following a tire change,
• Following an accident or a haphazard off-road excursion

Having your automobile aligned soon after any preceding situations enhance the likelihood of vibration problems not occurring.

A multiple or front-wheel realignment may be required based on your vehicle’s make and type. A skilled technician may use a wheel alignment device to level your tires.

Tire Wear Inequality

A slipping or damaged belt might force your tires to rattle or bounce, resulting in unequal tire wear. You have a new car that does not protect you from this issue since low-quality tires are more prone to wear out faster.

Drive at the shaking speeds and sense for the rumbling source to decide which tire needs replacing. If the steering column rattles more while driving, both front tires may have to be replaced.

Both rear wheels should be returned if the shaking comes from the seats or the flooring. All of your wheels may need to be replaced in the worst-case situation.

Runout of the wheels

A wheel runout is any portion of a wheel or tire component that is not precisely round by specification. It’s an issue of dynamic instability, which causes shaking at slower revs and extreme rattling at high velocities. Tires with misplaced or damaged belting may be part of a faulty tire-wheel system.

To assess for tangential and lateral runout, use a tire lineout meter, an off-car balancing, or a dial meter. The radial runout is checked in the middle of the tire sidewall. Also, the lateral runout is contained in the middle of the tire sidewall. To get the most outstanding results, perform this on a flat rib.

A Brake System That Isn’t Working

It is possible that your brake pads and rotors aren’t getting enough traction, leading to distorted brake discs with time. At 45 to 50 mph, disturbance through the steering column due to stiff brake calipers and discs becomes obvious.

The shaking becomes more vital as you approach closer to 70 mph, and there’s a scorching stench as you come to a halt. When stopping, wheel wobbling caused by a problem with the front braking will be more visible.

The shaking in the braking system indicates an issue with the rear brakes. Re-index the rotors in one or two lug locations on the hub, have the brake components honed, or consider replacing them if they are significantly worn out.

Worn Components

Vibration might be caused by other elements of your automobile wearing down over time. Shocks, higher strut bushings, rollers, and rear suspension ends are all examples. Wear in these components is frequently noticed in wheel alignment and requires replacement to correct the issue.

Worn wheel axles, for example, generate a high-pitched squeaking or grating noise that is simple to identify. Tie rod ends that are worn cause your car’s tires to wobble.

Frequently Asked Questions

What causes my car to shake over 70 mph?

Issues with your axles or tires are the most common vibration source beyond 70 mph. All possible issues are incorrect tire and wheel balancing, uneven tire pressure, split tire treads, broken wheels, and even loosened lug nuts.

How do you repair a vehicle that shakes when driving at high speeds?

If you notice vibrations emanating from the engine as you accelerate, it might be a sign that there isn’t enough power, gasoline, or oxygen reaching it. Check the plugs, filtration system, and air filter to see if they need to be changed.

Is it possible for a car’s gearbox to cause it to shake?

Yes. Shaking may be caused by a lack of automatic transmission lubrication. It’s time to see a professional if the indicator lights follow the wobbling. Manual automobile drivers may find that the cause of the shaking is their clutch maestro cylinder.

Is it possible for a starving engine to cause my vehicle to shake?

Yes. A car’s engine requires adequate air, gasoline, and spark to work correctly. Anything other than that, when your vehicle accelerates, jerks and wobbling will occur. You’ll feel vibrations emanating from the crankcase as well. You can get to the bottom of the issue by examining the spark plugs and replacing them if required. 

Conclusion

Finally, automobiles shake at speeds beyond 70 mph for various reasons, as discussed above, after noticing vibrations, a quick trip to the technician may assist avoid further mechanical faults and costly repairs. Steering wheel disturbances may also be avoided by routine servicing, safe driving, and according to manufacturer instructions.