Expedition 4WD V8-4.6L SOHC VIN W (1999)
7. WARNING: keep hands away from the balance weights while the driveshaft is rotating.
Check the driveshaft for out of balance.
1
With the transmission in gear, run the vehicle with the speedometer indicating 680 km (40 - 50 mph)
2
Have an assistant barely contact the driveshaft with a marker in the rear, middle, and front ends to indicate heavy spots.
8. Balance the driveshaft.
1
Install two stainless steel screw-type hose clamps on the driveshaft with the clamp screws opposite the mark.
2
Tighten the hose clamps starting at the pinion yoke end of the driveshaft.
9. Run the vehicle at 680 km (40 - 50 mph).
10. If the vibration is still evident, rotate the clamps away from each other until balanced and test.
11. If necessary, continue to rotate the clamps apart in smaller increments and test. If the vibration still exists, repeat the procedure at the front of the
driveshaft.
12. NOTE: If equipped with air suspension, reactivate the system by turning on the air suspension switch.
Install the tire and wheel assembly.
1
Position the tire and wheel assembly.
2
Install the lug nuts.
3
Lower the vehicle and tighten the lug nuts.
4
Install the center cap.
13. Road test the vehicle.
