GM Service Manual Online
For 1990-2009 cars only

Front Wheel Hub, Bearing, and Seal Replacement Independent

Removal Procedure

Tools Required

    • J 8092 Driver Handle
    • J 6368 Outer Bearing Race Installer
    • J 23448 Inner Bearing Race Installer
    • J 9746-02 Hub/Rotor Support
  1. Raise the vehicle. Support the vehicle with suitable safety stands.
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Notice: Support the caliper with a piece of wire to prevent damage to the brake line.

  4. Remove the caliper. Refer to Brake Caliper Replacement in Disc Brakes.

  5. Object Number: 175284  Size: SH
  6. Remove the dust cap (5).
  7. Remove the following components:
  8. • The cotter pin (6)
    • The nut (4)
    • The washer (3)
  9. Remove the wheel hub/rotor (7).
  10. • Pull the hub/rotor free. Ensure that the outer wheel bearing (2) comes free of the hub/rotor.
    • Do not damage the steering knuckle spindle threads.
  11. Remove the seal (10). Pry out the seal.
  12. Remove the inner wheel bearing (9).
  13. Remove the races (1, 8). Drive out each race using a brass drift, inserted behind the race, in the notches in the hub.
  14. Clean grease from the hub/rotor and the steering knuckle spindle.
  15. Remove grease from inside the following components:
  16. • The hub
    • The wheel bearings
    • The races

    Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

  17. Use clean solvent and a small brush with no loose bristles.
  18. Inspect the wheel bearings and the races for damage or wear. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis. If a bearing or the race is damaged or worn, replace the bearing and the race.
  19. Inspect the hub/rotor for the following conditions:
  20. • Damage
    • Out of round or scored
    • Pitting or cracks.

Installation Procedure


    Object Number: 175310  Size: SH

    Notice: Start the races squarely inside the hub/rotor to avoid distortion and possible cracking.

  1. Install the outer bearing race into the hub/rotor.
  2. 1.1. Place the hub/rotor on the J 9746-02 and rest the assembly on the press bars.
    1.2. Use the J 8092 in order to drive the outer bearing outer race into position.

    Object Number: 175308  Size: SH
  3. Turn over the hub/rotor.
  4. 2.1. Remove the J 9746-02 .
    2.2. Drive in the inner bearing race using the J 23448 .

    Important: 

       • Use an approved high-temperature front wheel bearing grease in order to lubricate the bearings. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
       • Do not mix different greases because mixing may change the properties of the greases, resulting in poor performance.

  5. Apply a thin film of grease to the following components:
  6. • The steering knuckle spindle at the outer wheel bearing seat and at the inner wheel bearing seat
    • The shoulder
    • The seal seat
  7. Apply a small quantity of grease inboard of each wheel bearing dust cap.
  8. Notice: Failure to completely pack the wheel bearing (cones, rollers, and cage) with grease will result in premature wheel bearing damage and/or wear.

  9. Fill each cone and roller assembly of the wheel bearing full of grease.
  10. • Use a cone-type grease machine that forces grease into the bearing.
    • If a cone-type grease machine is not available, pack the wheel bearing by hand.
    • When packing the wheel bearing by hand, work the grease into the bearings between the rollers, the cones, and the cage.

    Object Number: 175284  Size: SH
  11. Install the inner wheel bearing (9) into the hub/rotor. Apply an additional quantity of grease outboard of this bearing.
  12. Install a new seal (10).
  13. 7.1. In order to ensure that the seal is flush with the hub/rotor flange, use a flat plate or block in order to install the seal.
    7.2. Lubricate the seal lip with a thin layer of grease.
  14. Install the hub/rotor (7). Do not damage the steering knuckle spindle threads.
  15. Install the outer wheel bearing (2). Slide the bearing over the spindle until the wheel bearing fully seats against the hub/rotor outer race.
  16. Install the following components:
  17. • The washer (3)
    • The nut (4)
    • The cotter pin (6)
  18. Before the cotter pin is placed through the hole in the spindle, adjust the wheel bearings.
  19. Adjust the wheel bearings. Refer to Wheel Bearing Adjustment .
  20. Install the new cotter pin (6).
  21. 13.1. Make sure the bent pin ends do not interfere with the dust cap.
    13.2. Apply an additional quantity of grease outboard of the wheel bearing.
  22. Install the dust cap (5) on the hub/rotor (7).
  23. Install the caliper. Refer to Brake Caliper Replacement in Disc Brakes.
  24. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  25. Lower the vehicle.

Front Wheel Hub, Bearing, and Seal Replacement I-Beam

Removal Procedure

For front axle, hub, and components, refer to

Front Axle, Steering Knuckle, Hub, and Components (I-Beam Suspension)


Object Number: 175322  Size: LF
(1)Brake Hose Bracket Bolt
(2)Brake Hose Bracket Washer
(3)Brake Hose Bracket
(4)Steering Knuckle Cap
(5)Steering Knuckle Cap Gasket
(6)Steering Knuckle King Pin
(7)King Pin Bushing
(8)King Pin Spacer
(9)Steering Knuckle
(10)Steering Knuckle Spindle Gasket
(11)Splash Shield
(12)Brake Caliper
(13)Anchor Plate to Steering Knuckle Nut
(14)Anchor Plate to Steering Knuckle Washer
(15)Anchor Plate to Steering Knuckle Nut
(16)Anchor Plate to Steering Knuckle Nut
(17)Anchor Plate
(18)Hub/Rotor Nut
(19)Retainer Cap
(20)Cotter Pin
(21)Hub/Rotor Washer
(22)Outer Wheel Bearing
(23)Wheel Hub Bolt
(24)Wheel Hub/Rotor
(25)Inner Wheel Bearing
(26)Bearing Seal
(27)Steering Arm Bolt
(28)Steering Arm Bolt
(29)Steering Arm
(30)Stabilizer Shaft Link to Axle Nut
(31)Stabilizer Shaft Link to Axle Retainer
(32)Leaf Spring U-bolt Nut
(33)Leaf Spring U-bolt Washer
(34)Front Axle
(35)Spring Spacer
(36)Spring Spacer Bolt
(37)Steering Knuckle to Front Axle Shim
(38)Steering Knuckle to Front Axle Dust Seal
(39)Anchor Plate to Steering Knuckle Nut
(40)Grease Fitting
(41)Lock Pin
(42)Lock Pin Nut
(43)Lock Pin Washer
(44)Stabilizer Shaft Link Insulator
(45)Steering Knuckle to Front Axle Thrust Bearing
(46)Steering Knuckle Cap Gasket
(47)Steering Knuckle Cap
(48)Steering Arm Nut
(49)Cotter Pin
.

Tools Required

    • J 8092 Driver Handle
    • J 6368 Outer Bearing Race Installer
    • J 9746-02 Hub/Rotor Support
  1. Raise the vehicle. Support the vehicle with suitable safety stands.
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Notice: Support the caliper with a piece of wire to prevent damage to the brake line.

  4. Remove the caliper. Refer to Brake Caliper Replacement in Disc Brakes.
  5. Remove the retainer cap.
  6. Remove the following components:
  7. • The cotter pin
    • The nut
    • The washer
  8. Remove the wheel hub/rotor.
  9. • Pull the hub/rotor free from the spindle. Ensure that the outer wheel bearing comes free.
    • Do not damage the steering knuckle spindle threads.
  10. Remove the inner wheel bearing. Pry out the seal.
  11. Remove the races. Drive out each race using a brass drift.
  12. Remove the rubber gasket from the spindle.
  13. Clean the grease off of the hub/rotor and the steering knuckle spindle. Clean the grease from the inside of the hub.
  14. Notice: Do not spin the wheel bearings with compressed air to dry them-the wheel bearings may be damaged.

  15. Clean the grease off of the wheel bearings and the races. Use clean solvent and a small brush with no loose bristles.
  16. Inspect the wheel bearings and the races for damage or wear. Refer to Wheel Bearings Diagnosis in Suspension General Diagnosis. If a bearing or the race is damaged or worn, replace the bearing and the race.
  17. Inspect the hub/rotor for the following conditions and repair or replace the hub/rotor if necessary:
  18. • Out of round
    • Scored
    • Pitting or cracks

Installation Procedure

For front axle, hub, and components, refer to

Front Axle, Steering Knuckle, Hub, and Components (I-Beam Suspension)


Object Number: 175322  Size: LF
(1)Brake Hose Bracket Bolt
(2)Brake Hose Bracket Washer
(3)Brake Hose Bracket
(4)Steering Knuckle Cap
(5)Steering Knuckle Cap Gasket
(6)Steering Knuckle King Pin
(7)King Pin Bushing
(8)King Pin Spacer
(9)Steering Knuckle
(10)Steering Knuckle Spindle Gasket
(11)Splash Shield
(12)Brake Caliper
(13)Anchor Plate to Steering Knuckle Nut
(14)Anchor Plate to Steering Knuckle Washer
(15)Anchor Plate to Steering Knuckle Nut
(16)Anchor Plate to Steering Knuckle Nut
(17)Anchor Plate
(18)Hub/Rotor Nut
(19)Retainer Cap
(20)Cotter Pin
(21)Hub/Rotor Washer
(22)Outer Wheel Bearing
(23)Wheel Hub Bolt
(24)Wheel Hub/Rotor
(25)Inner Wheel Bearing
(26)Bearing Seal
(27)Steering Arm Bolt
(28)Steering Arm Bolt
(29)Steering Arm
(30)Stabilizer Shaft Link to Axle Nut
(31)Stabilizer Shaft Link to Axle Retainer
(32)Leaf Spring U-bolt Nut
(33)Leaf Spring U-bolt Washer
(34)Front Axle
(35)Spring Spacer
(36)Spring Spacer Bolt
(37)Steering Knuckle to Front Axle Shim
(38)Steering Knuckle to Front Axle Dust Seal
(39)Anchor Plate to Steering Knuckle Nut
(40)Grease Fitting
(41)Lock Pin
(42)Lock Pin Nut
(43)Lock Pin Washer
(44)Stabilizer Shaft Link Insulator
(45)Steering Knuckle to Front Axle Thrust Bearing
(46)Steering Knuckle Cap Gasket
(47)Steering Knuckle Cap
(48)Steering Arm Nut
(49)Cotter Pin
.


    Object Number: 175310  Size: SH

    Notice: Start the races squarely inside the hub/rotor to avoid distortion and possible cracking.

  1. Install the outer race into the hub/rotor.
  2. 1.1. Place the hub/rotor on the J 9746-02 and rest the assembly on the press bars.
    1.2. Use the J 6368 in order to drive the outer bearing race into position.
  3. Remove the J 9746-02 and use a 7.6 cm (3 in) diameter bar in order to drive the inner bearing race into position. Using a bar larger than 7.6 cm (3 in) may damage the bearing seal seat.
  4. Important: 

       • Use an approved high-temperature front wheel bearing grease in order to lubricate the bearings. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
       • Do not mix the greases because mixing may change the properties of the grease, resulting in poor performance.

  5. Apply a thin film of grease to the steering knuckle spindle at the outer wheel bearing seat and at the inner wheel bearing seat, the shoulder, and the seal seat.
  6. Apply a small quantity of grease inboard of each wheel bearing retainer cap.
  7. Notice: Failure to completely pack the wheel bearing (cones, rollers, and cage) with grease will result in premature wheel bearing damage and/or wear.

  8. Fill each wheel bearing (cone and roller assembly) full of grease.
  9. • Use a cone-type grease machine that forces grease into the bearing.
    • If a cone-type grease machine is not available, pack the wheel bearing by hand.
    • When packing the wheel bearing by hand, work the grease into the bearings between the rollers, the cones, and the cage.
  10. Install the inner wheel bearing into the hub/rotor. Apply an additional quantity of grease outboard of this bearing.
  11. Install a new seal.
  12. 7.1. In order to ensure that the seal is flush with the hub/rotor flange, use a flat plate or block to install the seal.
    7.2. Lubricate the seal lip with a thin layer of grease.
  13. Install the rubber gasket on the spindle.
  14. Install the hub/rotor. Do not damage the threads of the steering knuckle spindle.
  15. Install the outer wheel bearing. Slide the bearing over the spindle until the wheel bearing fully seats against the hub/rotor outer race.
  16. Install the following components:
  17. • The washer
    • The nut
    • The cotter pin
  18. Do not place the cotter pin through the hole in the spindle until the wheel bearings are adjusted.
  19. Adjust the wheel bearings. Refer to Wheel Bearing Adjustment .
  20. Install the retainer cap into place.
  21. Install the caliper. Refer to Brake Caliper Replacement in Disc Brakes.
  22. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  23. Lower the vehicle.
  24. Inspect the front wheel alignment. Refer to Wheel Alignment Specifications in Wheel Alignment.