F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
3. Disconnect the driveshaft from the rear axle universal joint flange. Rotate the driveshaft 180 degrees from its original position and reinstall. Repeat
Step 2.
4. In some cases, rotating the driveshaft 180 degrees can decrease the vibration to an acceptable level. However, if the vibration level is increased,
install the driveshaft in its original position and proceed to Step 5.
5. A vehicle is more sensitive to imbalance or runout at the rearward end of the driveshaft. Therefore, locate the heavy side of the driveshaft by the
use of Rotunda Electronic Strobe Balancer 006-01400 or equivalent as follows:
a. Scribe an axial chalk line (at any radial location) approximately 101.6 mm (4 inches) long at the rear of the driveshaft.
b. Locate the transducer on the bottom side of the carrier, and secure it in place.
c. Run the engine and driveline at the worst vibration speed noted and visually note the position of the chalk line by use of the strobe light. This
provides a starting point for the initial location of the clamps.
6. Stop the engine and rotate the driveshaft so the chalk line is in the same location as it was noted under the strobe light.
