Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Transfer Case: NVH
Symptom Chart - NVH
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Noise, Vibration and Harshness (NVH) . .
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.
| Symptom | Action |
|---|---|
| Grinding / moan / drone in 2H only | GO to Pinpoint Test A |
| The front axle makes noise in 2H | For 2-Speed Torque on Demand Transfer Case REFER to: Four-Wheel Drive Systems - Vehicles With: 2-Speed Torque On Demand Transfer Case . For Electronic Shift Transfer Case REFER to: Four-Wheel Drive Systems - Vehicles With: Electronic Shift Transfer Case . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.