Driveline Angles

Driveline Angles

Special Tool:

Special Tool(s)

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

1. Check the vehicle for evidence of overload or sagging. Check for specified air pressures information in all 4 tires.
2. Normalize the suspension.
3. Drive the vehicle onto a drive-on hoist or back onto a front-end alignment rack.
4. Inspect the suspension and chassis. Verify that the vehicle curb position ride height is within specification.
^ Measure the curb position ride height with the vehicle empty and all fluids full.





5. To check the driveshaft angle, place the Inclinometer flush against the bottom of the driveshaft and record the driveshaft angle reading.

6. NOTE: Remove the U-joint retaining clip before installing the tool.





To check the pinion angle, install the special tool. Check and record the pinion angle reading.





7. To check the engine angle, install the special tool. Check and record the engine angle reading.











8. Calculate the difference in the slope of the components to determine the U-joint operating angle.
^ When 2 connected components slope in the same direction, subtract the smaller number from the largest to find the U-joint operating angle. When 2 connected components slope in the opposite direction, add the measurements to find the U-joint operating angle.
^ The U-joint operating angle is the angle formed by 2 yokes connected by a cross and bearing kit. Ideally, the operating angles on each end of the driveshaft must:
- be equal or within 1.5 degrees of each other.
- have a 3 degree maximum operating angle.
- have at least 1/2 of one degree continuous angle.
^ If the tires and driveline angle are not the cause, carry out the NVH tests to determine whether the concern is caused by a condition in the axle.