Quick Answer: No, a car shaking violently at highway speed is not safe to drive. Ease off the gas gradually, move to the right lane, and get to the shoulder or an exit. The most common causes are a tire failure, a wheel balance issue, or a worn driveshaft or CV axle. Some of these can turn catastrophic at 65 mph with no warning. Get off the road and diagnose before driving further.
Is It Safe to Keep Driving When My Car Is Shaking This Hard at Highway Speed?
No. Violent shaking at highway speed means something is wrong with a component that is working very hard right now: a tire, a wheel, a driveshaft, or a suspension joint. Any of those can fail completely while you are moving at speed. The risk is not “you might damage the car.” The risk is losing control.
Ease off the throttle smoothly, do not brake hard, and work your way to the right shoulder. Turn on your hazards as soon as you start slowing. If you are near an exit, take it. A parking lot is safer than a highway shoulder if you have the option.
What Is Actually Causing the Violent Shaking?
The cause depends on when and how the shaking hits.
Shakes above 55 mph and gets worse with speed: Almost always a wheel balance or tire issue. A wheel weight can fall off mid-trip. The front tires are the most likely culprits because they steer. An out-of-balance front tire at 65 mph puts a heavy rhythmic load on the wheel bearing and tie rod ends.
Shakes and pulls to one side: A separated tire belt. You can sometimes see a bulge on the sidewall or tread. This is a blowout waiting to happen. Do not drive on it.
Shakes on acceleration, smooths out when coasting: The driveshaft or CV axle. On front-wheel-drive cars, a worn CV joint often vibrates hard under power and quiets when you lift off the gas. A clicking noise during turns earlier in the day confirms this. On rear-wheel-drive cars, look at the driveshaft U-joints.
Shakes at all speeds but worse at highway speed: A bent wheel, a loose lug nut, or a damaged tire. Check your lug nuts if it is safe to do so. A loose wheel at highway speed can separate entirely.
Check engine light flashing alongside the shaking: That combination means a misfiring engine, which can destroy a catalytic converter in minutes. Pull over immediately. See Check Engine Light Flashing and Car Shaking: Pull Over Now for what to do next.
What Do I Do Right Now If My Car Is Still Moving?
Get off the highway now. Here is the sequence:
- Release the accelerator gradually. Do not stomp the brake.
- Signal right and move lane by lane to the shoulder or an exit ramp.
- Turn on your hazard lights the moment you start your move over.
- Once stopped, get out on the passenger side away from traffic, or stay in the car with your seatbelt on if there is no guardrail and traffic is close.
- Set up warning triangles or flares behind the car. At a minimum, 100 feet back on a highway. For guidance on which to use, check Emergency Triangle vs Flares: Which Is Safer on the Highway?
- Call for a tow. Do not try to nurse the car to a shop at highway speed with violent shaking.
If you are not sure whether you can make it to the next exit safely,
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stay on the shoulder. A tow is cheaper than a crash.
Can I Drive It Slowly to a Shop Instead of Calling a Tow?
Maybe, but only under specific conditions. If the shaking completely stops below 30 mph and your tires look normal and your lug nuts are tight, you might be able to drive slowly on surface streets to a nearby shop. Slowly means 25 to 35 mph, hazards on, no highway.
If any of the following are true, call a tow truck:
- You can see a bulge or bubble on any tire
- The car pulls hard to one side
- The shaking is present even at low speed
- You heard a loud thump or bang before the shaking started
- A lug nut is loose or missing
A separated belt or a cracked wheel that lets go at 40 mph is just as dangerous as one that fails at 70. If you are unsure about the cost of a tow, check what roadside assistance costs without a membership before you assume it is out of reach.
Photo: Pexels
Common Questions
Q: My car shakes at 70 mph but is fine at 50 mph. Is that a wheel balance problem? A: Yes, that pattern almost always points to an out-of-balance wheel or a tire with a slight flat spot. Balance issues typically show up above a certain speed threshold, often between 60 and 75 mph, and can come and go. Get the wheels balanced and inspect the tires for uneven wear before driving at highway speed again.
Q: Can a bad wheel bearing cause violent shaking on the highway? A: Yes. A worn wheel bearing causes vibration that gets worse with speed and sometimes changes when you shift your weight left or right by gently steering. You may also hear a humming or growling noise that changes pitch with speed. A failing bearing can seize or cause the wheel to wobble dangerously. Do not drive on it.
Q: I hit a pothole and now my car shakes at highway speed. What did I break? A: A pothole can knock a wheel weight off, bend a wheel rim, or damage a tire internally. Start by looking at all four tires for bulges. Then check if the rim looks bent when the wheel is spinning slowly. A bent rim will not balance properly and needs to be replaced, not just balanced.
Q: Will my insurance cover a tow if my car starts shaking violently and I need to pull over? A: It depends on your policy. Comprehensive policies with roadside assistance typically cover a tow in this situation. Call your insurer before you call a random tow company to avoid paying out of pocket when you do not have to. State Farm, for example, has roadside assistance as an add-on, and coverage details vary by plan.
Q: My car is shaking and the transmission feels like it is slipping too. Are these related? A: They can be. A failing transmission mount lets the drivetrain move excessively and can cause vibration that feels like it is coming from the wheels. A transmission that is actually slipping under load will also cause surging and vibration. Either way, driving at highway speed is not safe. See Transmission Slipping on Highway: Do You Need a Tow? for more detail.
Need roadside help? Visit Tow With The Flow for real answers when your car breaks down.