Q: Front end vibration

asked by on

So I just replaced the following parts:

  1. Rack ends
  2. Tie rods
  3. Lower control arms
  4. Engine mounts
  5. Transmission mounts
  6. Stabilizer Bar Bushings
  7. Front shock mountings and bearings
  8. Front sway bars

I also had my car: 1. Aligned 2. Wheel-balanced (all 4) 3. Camber Correction 4. Tire rotation (all 4 cris-cross pattern)

After all these repairs, my car has suddenly acquired front-end vibration. To expound, it only happens when I step on the gas from 0 km/h going up. Furthermore, it is strong on the 2nd and 3rd gears.

What could be the cause/s of this?

It is important to take note of the following as well:

  1. This ONLY happened AFTER I got my car repaired.
  2. CV joints don't "click" whenever I turn
  3. Vibration ONLY happens when I driver; when I am idle, it is fine.
  4. Tires are only 9320 miles old

My car has 98300 miles.
My car has an automatic transmission.

By rotating the tires, you may have brought tires from the back to the front which have "road force variation" which was not as apparent when the tires were in the rear. Note that even brand new tires can vibrate due to lack of quality control and tire design deficiencies. As a first diagnostic, I would put the tires back where they were and, unless a mechanic’s inspection immediately found other plausible causes, you might have to have the tires checked on a "road force" type balancer. Also, the only way to be reasonably sure that a tire/wheel assembly is actually balanced is to have the technician balance the assembly, then completely remove the assembly from the machine and re-install it in a different position. If it still reads balanced in the NEW position, then it is probably balanced. But, what you will often find is the assembly won’t read balanced and that is because of technician error in mounting the assembly and/or the machine is simply not calibrated. Always ask the technician to remove and re-install the tire/wheel assembly if you really want to get what you are paying for which is a balanced assembly.


If the vibration becomes marked on gear changes, that might implicate a rotating component in the transmission or the torque converter. There is also the possibility of a defective harmonic balancer. With regard to the engine mounts, if they are not OEM dealer supplied, that would raise some suspicions and that is why, on a part like that, it is so important to use dealer supplied parts because once you install the "knock-off" if you end up with a problem like the one you have you are then literally in a circumstance where you are diagnosing BOTH possible defects in the "knock off" design and actual problems (in this case, vibration sources) that exist elsewhere in the vehicle.


The bottom line is you should request a vehicle vibration diagnostic. It is possible to use remote chassis ears (wireless microphones with an in-cabin receiver) to narrow the origin of the vibration and, if it gets really complicated, there are frequency domain analyzers that can take the noise from the vibration and decompose it to likely mechanical sources. My guess is, if you request the diagnostic, it will probably not get that complicated because, from what you are describing the vibration is marked, and consequently to a trained mechanic the likely origins will be obvious. If you have additional concerns or a follow-up on this, don’t hesitate to re-contact YourMechanic.

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. Front end vibration

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: Approximately, how long will a warranty last on a replaced or resealed valve cover gasket?

The engine valve cover gasket should last for about 8 to 12 years. If the gasket is leaking, then the PCV (Positive Crankcase Ventilation) valve is plugged up causing the engine to build up too much crankcase pressure blowing out...

Q: hi do i need to remove the upper intake manifold to change the coil pack on a 2007 montana sv6. one bolt seems to be under the man

The process to remove the coil does not call for the upper intake to be removed. It calls for the upper trim cover only to be removed. You may have to use a small swivel socket with a short extension...

Q: Rough misfire at idle.

Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...