For 1990-2009 cars

Table 1: | Vibration Symptoms that are Felt
Table 2: | Vibration Symptoms that are Heard

Important: Perform the following steps in sequence BEFORE using this symptom table.

1. Begin the diagnosis of a vibration concern by reviewing Diagnostic Starting Point - Vibration Diagnosis and Correction to become familiar with the diagnostic process used to properly diagnose vibration concerns.
2. Perform the Vibration Analysis - Road Testing Table before using this symptom table in order to duplicate and effectively diagnose the customer's concern.

### Symptom List

Refer to a Vibration Analysis Table as indicated in the following lists; based on the most dominant characteristics of the customer's vibration concern, felt or heard, that is evident during the appropriate condition of the occurrence.

#### Vibration Symptoms that are Felt

Category | Description | Typical Frequency Range | Condition of Occurrence | Area of Focus
--- | --- | --- | --- | ---
Shake | Can sometimes be seen or felt in the steering wheel, seat or console. Related terminology: shimmy, wobble, waddle, shudder, hop | 5-20 Hz | Vehicle Speed Sensitive Still occurs during coast down in NEUTRAL | Go to Vibration Analysis - Tire and Wheel
Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Roughness | Similar to the feeling of holding a jigsaw. | 20-50 Hz | Vehicle Speed Sensitive Still occurs during coast down in NEUTRAL | Go to Vibration Analysis - Tire and Wheel
Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Buzz | Similar to the feeling of holding an electric razor. May be felt in the hands through the steering wheel, in the feet through the floor, or in the seat of the pants. | 50-100 Hz | Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Tingling | May produce a "pins and needles" sensation or may put hands or feet "to sleep". Highest vibration frequency range that can still be felt. | Greater than 100 Hz | Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine

#### Vibration Symptoms that are Heard

Category | Description | Typical Frequency Range | Condition of Occurrence | Area of Focus
--- | --- | --- | --- | ---
Boom | Usually heard as an interior noise similar to the noise of a bowling ball rolling down an alley, deep thunder, or a bass drum. Note:

• | Related terminology - droning, growling, moaning, roaring, rumbling, humming

• | May not be accompanied by a perceptible vibration/roughness

20-60 Hz

Vehicle Speed Sensitive

Still occurs during coast down in NEUTRAL

Go to Vibration Analysis - Tire and Wheel

Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Moan or Droan | Similar to the sound of a bumblebee or blowing air across the top of a bottle. Note:

• | Related terminology - humming, buzzing, resonance

• | May be accompanied by a perceptible vibration/buzz

60-120 Hz

Vehicle Speed Sensitive

Affected by torque/load

Go to Vibration Analysis - Driveline

Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Howl | Similar to the sound of the wind howling. | 120-300 Hz | Vehicle Speed Sensitive Affected by torque/load | Go to Vibration Analysis - Driveline
Vehicle Speed Sensitive Affected by steering input | Go to Vibration Analysis - Hub and/or Axle Input
Engine Speed Sensitive | Go to Vibration Analysis - Engine
Whine | Similar to the sound of mosquitoes, turbine engines, or vacuum cleaners. | 300-500 Hz | Vehicle Speed Sensitive Affected by torque/load - 2WD mode Vehicle Speed Sensitive Affected by torque/load - 4WD mode | Go to Diagnostic Starting Point - Transfer Case in Transfer Case - Tracker