Symptom Chart - NVH
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
| Symptom | Possible Sources | Action |
|---|---|---|
| Transfer case whine - noise at all ranges | Incorrect fluid level or fluid quality Worn oil pump Under-inflated or oversized tires |
CHECK that the transfer case is filled to the correct level and with the specified fluid. REFER to: Transfer Case Draining and Filling
. REFER to: Transfer Case . CONFIRM that the tires and wheels are correct for the vehicle. CHECK that the tire inflation pressures are correct. |
| Transfer case growl/rumble - noise at all ranges | Damaged or worn bearings or planetary gear | DISASSEMBLE the transfer case. CHECK the bearings or planetary gear for wear or damage. REPAIR as necessary. REFER to: Transfer Case . |
| Transfer case scraping/grating - noise at all ranges | Excessively stretched drive chain hitting the case | DISASSEMBLE the transfer case. CHECK the drive chain for wear or damage. REPAIR as necessary. REFER to: Transfer Case . |
| Transfer case howl/hum - noise at all ranges or 4X4 only | Worn or damaged sun (input) gear, clutch pack (intermediate) gear or output shaft gear | DISASSEMBLE the transfer case. CHECK the gears for wear or damage. REPAIR as necessary. REFER to: Transfer Case . |
| Unable to duplicate customer concern | 4WD system and/or related components | CARRY OUT the Manual Shift-On-Stop (MSOS) Functional Test. GO to Pinpoint Test F |