Most steering rack problems on Audis develop slowly, so it is best to check for early warning signs and do a repair before the job becomes a lot bigger. Knocking or Clunking Over Bumps Worn steering rack mounts or loose tie rod ends can cause a knocking sound to emanate from the front of the car when going over speed bumps or driving down uneven sections of road. The knocking sound can be a hollow sounding knock that can be felt through the floor of the car as well as…