Drive/Propeller Shafts, Bearings and Joints: Testing and Inspection

Driveline Angle Inspection





Special Tool(s)

CAUTION: Prior to checking driveline angularity, inspect the U-joints for correct operation.

NOTE: An incorrect driveline angle can cause a vibration or shudder.





Navigator, 4x2

1. For the driveshaft angle reading, place the special tool flush against the bottom of the driveshaft. Press the ALT ZERO button to calibrate the inclinometer.





2. To check the pinion operating angle, rotate the driveshaft so that the rear axle pinion flange yoke ear is parallel to the floor. Install the special tool. Check and record the pinion operating angle reading.
^ If the angle is not within specifications, repair or adjust to obtain the correct angle . Inspect the rear suspension, rear axle, rear axle mounting or the frame for wear or damage.
3. To check the transmission operating angle, place the special tool on a flat and level surface. Press the ALT ZERO button to calibrate the inclinometer.





4. Install the special tool on the driveshaft and record the reading.
5. The average between the front reading and the rear reading is the operating angle of the driveshaft center bearing.

All vehicles, except Navigator 4x2





6. For the driveshaft angle reading, place the special tool flush against the bottom of the driveshaft. Press the ALT ZERO button to calibrate the inclinometer.





7. To check the pinion operating angle, rotate the driveshaft so that the rear axle pinion flange yoke ear is parallel to the floor. Remove the U-joint snap ring, then install the special tool. Check and record the pinion operating angle reading.
^ If the angle is not within specifications, repair or adjust to obtain the correct angle. Inspect the rear suspension, rear axle, rear axle mounting or the frame for wear or damage.
8. Repeat the step, using the front universal joint to record the transmission operating angle.

All vehicles
9. Compare the operating angles. Ideally, the operating angles on each end of the driveshaft must:
^ be equal or within one degree of each other.
^ have a three degree maximum operating angle.
^ have at least one-half degree of operating angle.