Drive Shaft Angles
NOTE:
An incorrect driveline angle can cause a vibration or shudder.
NOTE:
Prior to checking driveline angularity, inspect the "U" joints for proper operation.
- Check the vehicle for evidence of overload or sagging. Check for specified air pressure in all 4 tires. Normalize the suspension. Drive the vehicle onto a drive-on hoist or front-end alignment rack.
- 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. See appropriate SPECIFICATION & PROCEDURES article in WHEEL ALIGNMENT.
- Place the Driveline Inclinometer (164-R2402), flush against the bottom of the drive shaft. See Fig 1 . After the tool has been held on the drive shaft surface for 5 seconds, push the ALT ZERO button to calibrate to zero degrees. Remove the driveline inclinometer.
- To check the pinion angle, rotate the drive shaft so that the differential pinion flange yoke ear is parallel to the floor. Remove the "U" joint snap ring, then install the driveline inclinometer. Check and record the pinion angle reading. See Fig 2 . If the angle is not within specifications, repair or adjust to obtain the correct angles. See Fig 3 or Fig 4 . Inspect the rear suspension, rear axle, rear axle mounting or the frame for wear or damage.
- To check the engine angle, rotate the drive shaft so that the slip yoke ear is parallel to the floor. Remove the "U" joint snap ring, then install the driveline inclinometer. Check and record the engine angle reading. See Fig 5 . If the angle is not within specifications, repair or adjust to obtain the correct angles. Inspect the powertrain/drivetrain mounts or frame rails for wear or damage.
