Operating Condition - Vehicle is Moving

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Depends more on how the vehicle is operated:
1. Speed related
  - Related to vehicle speed
    - Pitch increases with vehicle speed. GO to SYMPTOM CHART .
    - Noise occurs at specific vehicle speed. A high-pitched noise (whine). GO to SYMPTOM CHART .
    - Loudness proportional to vehicle speed. Low-frequency noise at high speeds, noise and loudness increase with speed. GO to SYMPTOM CHART .
    - A low-pitched noise (drumming). GO to SYMPTOM CHART .
    - Vibration occurs at a particular speed (mph) regardless of acceleration or deceleration. GO to SYMPTOM CHART .
    - Noise varies with wind/vehicle speed and direction. GO to SYMPTOM CHART .
  - Related to engine speed
    - Noise varies with engine rpm. GO to SYMPTOM CHART .
    - Vibration occurs at a particular speed (mph) regardless of engine speed (rpm).
2. Acceleration
  - Wide open throttle (WOT)
    - Engine induced contact between components. Inspect and repair as necessary.
    - Noise is continuous throughout WOT. Exhaust system or engine ground out. GO to SYMPTOM CHART .
  - Light/moderate acceleration
    - Tip-in moan. Engine/exhaust noise. GO to SYMPTOM CHART .
    - Knock-type noise. GO to SYMPTOM CHART .
    - Driveline shudder. GO to SYMPTOM CHART .
    - Engine vibration. GO to SYMPTOM CHART .
3. Turning noise. GO to SYMPTOM CHART .
4. Braking
  - Clicking sound is signaling ABS is active. Acceptable ABS sound.
  - A continuous grinding/squeal. GO to SYMPTOM CHART .
  - Brake vibration/shudder. GO to SYMPTOM CHART .
5. Shifting
  - Noise or vibration condition related to the transmission (automatic). GO to SYMPTOM CHART .
6. Cruising speeds
  - Accelerator pedal vibration. GO to SYMPTOM CHART .
  - Driveline vibration. GO to SYMPTOM CHART .
  - A shimmy or shake. GO to SYMPTOM CHART .
7. Driving at low/medium speeds
  - A wobble or shudder. GO to SYMPTOM CHART .
Depends more on where the vehicle is operated:
1. Bump/pothole, rough road or smooth road. GO to SYMPTOM CHART
  - Noise is random or intermittent occurring from road irregularities. GO to SYMPTOM CHART .
  - Noise or vibration changes from one road surface to another. Normal sound changes.
  - Noise or vibration associated with a hard/firm ride. GO to SYMPTOM CHART .