Q: Excess Vibration Front Wheels; knocking sound when going over bumps

asked by on June 27, 2017

Hi there,

So I went ahead and replaced the following parts of my car:

  1. tie rods
  2. rack ends
  3. control arms
  4. engine mounts
  5. transmission mount
  6. sway bar links

Also, I had my car: 1. Aligned 2. Cambered properly 3. 4-wheel balanced 4. 4 tire rotation

After all these repairs, my car suddenly had a strong vibrating problem. It only occurs when I step on the gas pedal, so basically when I accelerate (kinda lessens during high speed and coasting).

Furthermore, I still have the "knocking/clunking" sound whenever i go over slight bumps (low or high speeds).

What could be the problem?

(it is important to note that my mechanic forgot to install new stabiliser bar bushings)

My car has 158100 miles.
My car has an automatic transmission.

What you are describing sounds like a failing CV joint. A CV (Constant Velocity) joint is a shaft that connects the transmission to the wheels, essentially transferring the power from the drive train directly to the wheels. The CV joint is packed with a special grease and sealed tight with the rubber or plastic boot, that is held in place with two clamps. The most common problem with the CV joints is when the protective boot cracks or gets damaged. Once this happens, the grease comes out and moisture and dirt get in, causing the CV joint to wear faster and eventually fail due to lack of lubrication and corrosion. When the CV joint becomes damaged or worn, you may hear a clicking, clunking or popping sound coming from this area as the weight of the vehicle puts pressure on this area and shifts back and forth and side to side. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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