Econoline E350 1 Ton V8-5.4L Prop SOHC VIN Z (1998)
Drive/Propeller Shaft: Service and Repair
Runout and Balance
1. Use a twin post axle contact hoist to raise and support the vehicle.
2. Remove the rear wheels and tires. Install the lug nuts to retain the brake drums.
3. Note and record base line speed.
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With the transmission in gear, increase the vehicle speed to the maximum vibration level. Note and record the speed of this vibration period as
a base line speed.
CAUTION: To prevent overheating, do not run the vehicle on the hoist for an extended period.
4. Check the attachment of the driveshaft to the rear axle flange. Replace any worn parts.
5. Check the driveshaft for out of balance.
1. With the transmission in gear, run the vehicle with the driveshaft rotating 64-80 km/h (40-50 mph).
2. Have an assistant barely contact the driveshaft with a marker in the rear, middle, and front end to indicate heavy spots.
WARNING: KEEP HANDS AWAY FROM THE BALANCE WEIGHTS WHILE THE DRIVESHAFT IS ROTATING.
6. 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.
7. Run the vehicle at the base line speed.
8. If the vibration is still evident, rotate the clamps away from each other until balanced and test.
9. 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.
