Four-Wheel Drive Systems - Vehicles With: 2-Speed Torque On Demand Transfer Case: NVH
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart -- NVH
NOTE:
NVH symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to Noise, Vibration and Harshness (NVH)
. Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Noise, Vibration and Harshness (NVH) .
| Condition | Actions |
|---|---|
| The front axle makes noise in 2H | Possible Sources: Needle bearings between halfshafts and wheel hub GO to Pinpoint Test AB Possible Sources: Tire or Fluid level GO to Pinpoint Test AC |
| Transfer case whine -- noise at all ranges | GO to Pinpoint Test AD |
| Transfer case growl/rumble - noise at all ranges | GO to Pinpoint Test AE |
| Transfer case scraping/grating - noise at all ranges | GO to Pinpoint Test U |
| Transfer case howl/hum -- noise at all ranges or 4H only | GO to Pinpoint Test AG |