Skip the auto shop - Our mechanics make house calls

Q: My car starts shaking when i accelerate over 50 mph. I have had my tires balance and rotated. I put air tires and new brakes.

asked by on

My car starts to shake when i accelerate over 55mph.

My car has 105000 miles.
My car has an automatic transmission.

Common causes of the vibration you are describing include wheel bearing faults, wheel/tire assembly imbalance, and defective tires. Other, less common possibilities include suspension faults (strut/shock failure), loose or worn out motor mounts, and even exhaust system faults. Certain tire defects, particularly internal belt damage or separations, as well as irregular tire wear will cause vibration. Defective tires will vibrate no matter how "well" balanced they are and indeed some brand new tires with irregularities in sidewall stiffness and excessive radial force variation will vibrate no matter how well balanced. Contributing factors in the circumstance you are describing could be worn struts in the suspension. If there are flat spots on the tire tread, that would be indicative of worn struts. If you request a noise/vibration diagnostic, a certified mechanic from YourMechanic would evaluate all the possibilities and resolve this for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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. My car starts shaking when i accelerate over 50 mph. I have had my tires balance and rotated. I put air tires and new brakes.

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: Where are the motor mounts location on a 2004 Ford Free star. I see the top one. Need to life motor to replace water pump. 2004 Ford Freestyle

Hi there - there are actually 4 mounts that locate the engine/transmission as a unit. The top link (you've already identified) is, complemented by 3 additional mounts around the lower perimeter of the engine/transmission, attaching the unit to the frame....

Q: Been hearing a knocking noise when i hit the breakes and this morning it wont start

The first thing to check is to see if the anti-theft light is on when you are trying to crank the car. If it is, then try and have someone give you a jump start to raise the battery voltage...

Q: 2007 Nissan Frontier won't go into any gear

The shifter cable connects the interior gear selector to the transmission. This allows the driver to select the correct gear. If the cable is detached, the gear selector will just flop around but not select any gear, as you describe....

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.