Operating Condition - Vehicle Is Moving

1. Depends more on how the vehicle is operated

1. Speed related

^ Related to vehicle speed

- Pitch increases with vehicle speed. GO
to Symptom Chart - Tire
Noise/Vibration.

- Noise occurs at specific vehicle speed.
A high-pitch noise (whine). GO to
Symptom Chart - Driveline
Noise/Vibration.

- Loudness proportional to vehicle
speed. Low-frequency noise at high
speeds, noise and loudness increase
with speed. GO to Symptom Chart -
Driveline Noise/Vibration.

- A low-pitched noise (drumming). GO
to Symptom Chart - Engine
Noise/Vibration.

- Vibration occurs at a particular speed
(mph) regardless of acceleration or
deceleration. GO to Symptom Chart
- Tire Noise/Vibration.

- Noise varies with wind/vehicle speed
and direction. GO to Symptom Chart
- Air Leak and Wind Noise.

^ Related to engine speed.

- Noise varies with engine rpm. GO to Symptom Chart - Engine Noise/Vibration.

- 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 - Engine
Noise/Vibration.

^ Light/moderate acceleration

- Tip-in moan. Engine/exhaust noise. GO to Symptom Chart - Engine Noise/Vibration.

- Knock-type noise. GO to Symptom Chart - Engine Noise/Vibration.

- Driveline shudder. GO to Symptom Chart - Driveline Noise/Vibration.

- Engine vibration. GO to Symptom
Chart - Engine Noise/Vibration.

3. Turning noise. GO to Symptom Chart

- Steering Noise/Vibration.

4. Braking.

^ Clicking sound is signaling ABS is active.
Acceptable ABS sound.

^ A continuous grinding/squeal. GO to
Symptom Chart - Brake
Noise/Vibration.

^ Brake vibration/shudder. GO to Symptom
Chart - Brake Noise/Vibration.

5. Clutching

^ A noise occurring during clutch operation.
GO to Symptom Chart - Transmission
(Manual) and Transfer Case
Noise/Vibration.

^ Vibration. GO to Symptom Chart -
Transmission (Manual) and Transfer
Case Noise/Vibration.

6. Shifting

^ Noise or vibration condition related to the transmission (automatic). GO to Symptom Chart - Transmission (Automatic) Noise/Vibration.

^ Noise or vibration related to the transmission (manual). GO to Symptom Chart - Transmission (Manual) and Transfer Case Noise/Vibration.

7. Engaged in four-wheel drive. GO to Symptom Chart - Transmission (Manual) and Transfer Case Noise/Vibration.

8. Cruising speeds

^ Accelerator pedal vibration. GO to Symptom Chart - Engine Noise/Vib ration.

^ Driveline vibration. GO to Symptom Chart - Driveline Noise/Vibration.

^ A shimmy or shake. GO to Symptom Chart - Tire Noise/Vibration.

9. Driving at low/medium speeds

^ A wobble or shudder. GO to Symptom Chart - Tire Noise/Vibration.

2. Depends more on where the vehicle is operated

1. Bump/pothole, rough road or smooth road.
GO to Symptom Chart - Suspension
Noise/Vibration.

^ Noise is random or intermittent occurring from road irregularities. GO to Symptom Chart - Squeak and Rattle.

^ 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 - Suspension Noise/Vibration.