Pinpoint Test K: Transfer Case Vibration
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- K1 INSPECT THE TRANSFER CASE
- Inspect the transfer case for loose or missing mounting bolts. Check for fluid seepage between the transfer case and the transmission.
- Are any mounting bolts missing or loose?
Yes: TIGHTEN to specifications or INSTALL new bolts as necessary. REFER to TRANSFER CASE-POWER TRANSFER UNIT (PTU) . TEST the system for normal operation.
No: GO to K2.
- K2 INSPECT THE REAR DRIVESHAFT
- Inspect the driveshaft for missing weights, damage or undercoating.
- Inspect the CV joint or U-joints for freedom of movement.
- Check the driveshaft runout and, if necessary, check the pinion flange runout.
- Are the driveshaft (CV joint) or U-joints worn, damaged or misaligned?
NOTE: Verify that the driveshaft and pinion flange index marks are aligned.Yes: REPAIR or INSTALL a new driveshaft or U-joints as necessary. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
No: GO to K3.
- K3 CHECK THE DRIVELINE ANGLES
- Measure the rear driveshaft and pinion angles. Refer to DRIVELINE SYSTEM-GENERAL INFORMATION .
- Measure the front driveshaft and pinion angles. Refer to DRIVELINE SYSTEM-GENERAL INFORMATION .
- Are the driveline angles incorrect?
Yes: REPAIR as necessary. TEST the system for normal operation.
No: GO to K4.
- K4 ROAD TEST WITH THE REAR DRIVESHAFT REMOVED
- Remove the rear driveshaft. Refer to REMOVAL AND INSTALLATION .
- Test drive the vehicle.
- Is the vibration gone?
NOTE: Index mark the driveshaft to the pinion flange and to the output shaft before removal.Yes: INSTALL and BALANCE the rear driveshaft. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
No: The transfer case is OK. CONDUCT a diagnosis on other suspect systems.