Propeller Shaft Runout Measurement

^ Tool Required:
- J 8001 Dial Indicator Set

Important: Noise or vibrations at high speeds could be caused by a bent propeller shaft. The propeller shaft could have been damaged by rough handling or a collision. Check for propeller shaft straightness.

1. Place transmission range selector lever in "NEUTRAL."
2. Raise the vehicle on a twin post hoist so that the vehicle is supported on the rear axle housing and rear wheels are free to rotate.





3. Mount J 8001 on a movable support that is high enough to permit contact of the indicator button with the propeller shaft, or mount J 8001 to a magnetic base and attach to a smooth place on the vehicle underbody. Readings are to be taken at points indicated.
4. Check for runout by turning a rear wheel to rotate the propeller shaft.
5. If runout exceeds 1.40 mm (0.055 inch), disconnect propeller shaft at differential drive pinion gear yoke and rotate the propeller shaft 180°. Reinstall propeller shaft. Check runout again.
6. If runout is still over specifications at the differential drive pinion gear yoke end, differential drive pinion gear yoke runout should be measured. Refer to "Differential Drive Pinion Gear Yoke Runout Measurement" in the following procedure. If runout is still over specifications, replace the propeller shaft, but only after checking for vibrations or noise.
7. Lower vehicle.