GM Grand Am/Achieva/Calais/Skylark/Somerset 1985-98

Front Hub and Bearing

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REMOVAL & INSTALLATION



See Figures 1 through 6

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Fig. Fig. 1: Insert a drift punch through the rotor to prevent it from turning, then ...



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Fig. Fig. 2: ... remove the hub nut and washer



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Fig. Fig. 3: On later models, a special tool is necessary to press the axle from the hub

This procedure requires the use of a number of special tools.

  1. Raise and safely support the vehicle with jackstands. Place the jackstands under the frame so that the front suspension hangs freely.
  2.  
  3. Remove the front tire.
  4.  
  5. If a silicone (gray) boot is used on the inboard axle joint, place boot seal protector J-33162 or equivalent. If a thermoplastic (black) boot is used, no seal protector is necessary.
  6.  
  7. Insert a drift punch through the brake caliper to the rotor cooling vanes to lock the rotor in place and remove the hub nut. Clean the drive axle threads of all dirt and grease.
  8.  



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Fig. Fig. 4: Unfasten the hub and bearing retaining bolts, then ...



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Fig. Fig. 5: ... remove the hub/bearing and shield from the halfshaft/drive axle



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Fig. Fig. 6: Remove and discard the O-ring seal

  1. Remove the brake caliper mounting bolts, and then remove the caliper from the steering knuckle. Support the caliper with string or wire. Do NOT allow it to hang by the brake hose.
  2.  
  3. Remove the brake rotor.
  4.  
  5. Attach tool J-28733 or equivalent and separate the hub and drive axle/halfshaft.
  6.  
  7. Remove the three hub/bearing retaining bolts, shield, hub and bearing assembly and O-ring. Discard the O-ring.
  8.  
  9. If the steering knuckle is in need of replacement, it can be removed from the vehicle by unbolting the two strut-to-knuckle nuts, followed by the ball joint nut.
  10.  

The hub and bearing are replaced as an assembly.

  1. Using a punch, tap the seal in the steering knuckle toward the engine. When the seal is removed from the steering knuckle, cut it off the drive axle using wire cutters. The factory seal is installed from the engine side of the steering knuckle, but the service replacement is installed from the wheel side of the steering knuckle.
  2.  

To install:
  1. Install the new hub and bearing seal in the steering knuckle using a suitable hub seal installer tool.
  2.  
  3. If the steering knuckle was removed, connect it to the strut and ball joint. Torque the bolts to the required specification.
  4.  
  5. Clean any rust or dirt from the mounting surfaces of the steering knuckle and the hub/bearing.
  6.  
  7. Using a new O-ring, install the new hub/bearing to the steering knuckle. Tighten the three bolts to 70 ft. lbs. (95 Nm).
  8.  
  9. Install the rotor, followed by the caliper. Torque bolts to the required specification.
  10.  
  11. Insert a drift punch through the brake caliper to the rotor cooling vanes to lock the rotor in place. Install the washer and axle nut, and tighten it to 192 ft. lbs. (260 Nm) and remove the hub nut. Clean the drive axle threads of all dirt and grease.
  12.  
  13. Install the wheel.
  14.  
  15. Lower the vehicle from the jackstands.
  16.  

 
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