Q: The car vibrates at a certain speed

asked by on

The car vibrates when the speed reaches about 50 MPH and it continues until about 65 MPH. Then it goes away. The tires/wheels have been checked on numerous occasions. Have not had any success to finding out what is causing the vibration.

My car has 1000000 miles.
My car has an automatic transmission.

Hello. Since the vibration is vehicle speed sensitive, it is likely that it is related to the wheel/tire assemblies, driveline, and/or suspension. An expert would sequentially look at these systems to isolate the problem. The causes can be quite surprising.

A weak or failing shock or strut can account for this. In one notable case, I had a car equipped with new Dunlop tires that vibrated terribly. The tire/wheel assemblies all checked out perfectly on a calibrated balancer. It turns out the tire sidewalls were just too stiff in for that car’s specific suspension. Switched to Michelin tires and the problem disappeared instantly. You could try to have the wheel tire assemblies evaluated on a "road force" type balancer which accounts for variance in sidewall stiffness.

Tires might have unusual wear, often due to lack of rotation or misalignment, and this can cause vibration. If your wheel bearings have more than .002 inch of play, that could cause it as well. There could even be an issue with an unbalanced CV shaft or driveline, or loose u-joints.

Brake rotors or drums could be out of balance. To cover that possibility, you could try re-indexing (by one or two lug positions) the rotor or drum on the hub (try one wheel position at a time) to see if there is a reduction in the vibration. For help having this addressed appropriately, a professional from YourMechanic can conduct relevant tests to diagnose the vibration issue and advise on a repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. The car vibrates at a certain speed

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: engine light-p303 cylinder 3 misfire, changed spark plugs,ingition coil and cylinder valves

Coils and plugs are usually the starting point for a misfire code, but some basic diagnostic work might save you some money. Sometimes I like to try swapping components from cylinder to cylinder to see if the misfire moves before...

Q: When i remove fuel pump regulator should there be fuel in it and if not how do i know if regulator is bad

I'm assuming you're talking about the fuel pressure regulator. If the regulator is not leaking, the only test for it's functionality is a fuel pressure test. That takes some special equipment. If the car is backfiring out of the intake,...

Q: Car shakes in par and when put in reverse

Hi. The concern you are describing for your 1999 BMW 318i sounds like that of a worn engine or transmission mount. The transmission and engine mounts have rubber bushings inside of them which dampen the engine vibrations. The mounts are...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.