Car Shakes when Driving Over 70 mph (Explained!)

Have you ever noticed your car shaking when driving over 70 mph? If so, you’re not alone. Many people experience this phenomenon and it can be caused by a number of different things.

In this blog post, we’ll explore some of the possible causes of a car shaking at high speeds and offer some tips on what you can do to fix it.

Why Your Car shakes when driving over 70 mph

Bad Cv Joints

One of the most common causes of a shaking car is bad CV joints. The CV joints are part of the drive axle assembly, which connects the transmission to the wheels.

A CV joint is a sealed ball and socket type joint that allows for rotation in two planes, while also having limited fore and aft movement. When they fail, they make a rattling sound and cause vibration in your steering wheel when you accelerate and reach speeds of 70 mph.

Replacing them is fairly easy and inexpensive, but it’s best to have an experienced mechanic do the work because they can be difficult to replace in some cars.

Unbalanced Tires

If your tires are unbalanced, then you may notice a shaking when driving over 70 mph. Tires that are out of balance will cause excessive wear on them and also increase fuel consumption due to their irregular motion while driving down the road.

You should always take your car into an auto repair shop for an inspection if you think that this is causing your issue!

Worn Control Arms

Another common cause of shaking when driving over 70 mph is failing control arms or bushings on either side of your vehicle’s suspension system, control arms are responsible for keeping your car’s wheels in alignment, and if they are failing, your car’s wheels may start to wander, causing your car to shake.

Bad Shock Absorbers

One reason is that your shock absorbers might be bad. Shock absorbers are responsible for absorbing the impact of the road as you’re driving. If they’re not working properly, the bumps in the road will cause your car to shake.

Failing Motor Mounts

Another reason for a shaking car is bad motor mounts. The motor mounts hold your car’s engine in place. If they’re not working properly, the engine will shake and cause the whole car to shake at 70+ mph mounts.

Check Wheel Alignment

Lastly, it could just be that you have bad alignment and need an alignment checkup. If your alignment is off, then you’ll need to get it fixed before anything else. This is when your car’s wheels are not pointing in the same direction. This can cause your car to pull to one side and make it difficult to drive. If your car is shaking because of bad alignment, you’ll need to take it to a mechanic to get it fixed.

How Do You Fix a Car Shaking at 70 mph

There are a few things that can cause your car to shake when driving at high speeds. The first thing you should check is your tires. Make sure they are properly inflated and that the tread is not worn down. You should also have them balanced and aligned.

If the problem persists, it could be due to the mounts. Make sure they are secure and not worn out. If the problem still exists, take the car to an auto repair shop for a suspension diagnosis.