GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 SLS 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Hub/Axle Flange and Wheel Stud Runout Inspection

Special Tools

J 8001 Dial Indicator Set, or equivalent

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Mark the relative location of the wheels to the wheel studs and mark the specific vehicle position on each tire and wheel - LF, LR, RF, RR.
  3. Remove the tire and tire assembly from the vehicle. Refer to Tire and Wheel Removal and Installation.
  4. Remove the brake rotor from the vehicle. Clean the mounting surfaces of the brake rotor and hub/axle flange for foreign material, dust, rust, and corrosion. Refer to Front Brake Rotor Replacement and Rear Brake Rotor Replacement.

    5. Object Number: 205276 Size: SH
  5. Position the J 8001 , or equivalent, onto the machined surface of the wheel hub/axle flange outside the wheel studs.
  6. slowly rotate the hub one complete revolution to find the low spot.
  7. Set the J 8001 , or equivalent to zero at the low spot.
  8. Slowly rotate the hub one more complete revolution and measure the total hub/axle flange runout.

    9. Specification - Guideline
    Wheel hub/axle flange runout tolerance guideline: 0.132 mm (0.005 in)

  9. If the runout of the hub/axle flange runout is within specification, go to step 12.
  10. If the runout of the wheel hub/axle flange is marginal, the wheel hub may or may not be the disturbance source .
  11. If the runout of the wheel hub/axle flange is excessive, replace the wheel hub/axle flange. Measure the runout of the hub/axle flange. Refer to the corresponding procedures:
    12. •  Front Wheel Bearing and Hub Replacement
    •  Rear Wheel Bearing and Hub Replacement

    Object Number: 205279 Size: SH
  12. Position the J 8001 , or equivalent to contact with the wheel mounting studs.

    13. Measure the stud runout as close to the flange as possible.

  13. Rotate the hub one complete revolution to register on each wheel stud.
  14. Set the J 8001 , or equivalent to zero on the lowest stud.
  15. Slowly rotate the hub one complete revolution and measure the total runout of wheel stud (stud circle).

    16. Specification - Guideline
    Wheel stud runout tolerance guideline: 0.254 mm (0.010 in)

  16. If the runout of the wheel stud (stud circle) is marginal, the wheel stud may or may not be the disturbance source.
  17. If the runout of the wheel stud (stud circle) is excessive, replace the wheel stud as necessary. Measure the runout of the new wheel stud. Refer to the corresponding procedures:
    18. •  Wheel Stud Replacement
    •  Wheel Stud Replacement