Use the diagnostic instructions in this section along with the necessary listed tools to identify the vibration order and to isolate the symptom and the possible systems associated with that symptom. Then based on the results from the road test, make a determination of which action in the symptom chart to take first. Since it is possible any one of multiple systems may be the cause of the symptom, it may be necessary to use a process of elimination type diagnostic approach to pinpoint the concern.
Symptom Chart: Vehicle-Speed Related Vibrations
NOTE: Any assembly that is out of balance will only cause a first order vibration, it will not cause a higher order vibration.
When a vehicle-speed related vibration is present, both tire-speed related vibration and axle shaft-speed related vibration calculations should be carried out.
Symptom Chart-Tire-Speed Related Vibrations
Symptom Chart
Condition | Possible Sources | Actions |
|---|---|---|
First order tire vibration Tire or wheel | Symptom Chart: NVH REFER to: Wheels and Tires (204-04A Wheels and Tires, Diagnosis and Testing). | |
Wheel bearings | Symptom Chart: NVH REFER to: Front Suspension (204-01 Front Suspension, Diagnosis and Testing). | |
Driveshaft | Symptom Chart: NVH REFER to: Driveshaft (205-01 Driveshaft, Diagnosis and Testing). | |
Brake disc | Symptom Chart: NVH REFER to: Front Disc Brake (206-03 Front Disc Brake, Diagnosis and Testing). or REFER to: Rear Disc Brake (206-04 Rear Disc Brake, Diagnosis and Testing). | |
Second order tire vibration | Tire or wheel | Symptom Chart: NVH REFER to: Wheels and Tires (204-04A Wheels and Tires, Diagnosis and Testing). |
Third order tire vibration | Tire or wheel | Symptom Chart:NVH REFER to: Wheels and Tires (204-04A Wheels and Tires, Diagnosis and Testing). |
Driveshaft | Symptom Chart: NVH REFER to: Driveshaft (205-01 Driveshaft, Diagnosis and Testing). |
Symptom Chart-Driveshaft-Speed Related Vibrations
Symptom Chart
Condition | Possible Sources | Actions |
|---|
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.