GM Lumina/Silhouette/Transport APVs 1990-1999 Repair Guide

Front Hub and Bearings

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REMOVAL AND INSTALLATION



  1. Raise and safely support the vehicle.
  2.  
  3. Place jackstands under the frame.
  4.  
  5. Lower the vehicle slightly so the weight of the vehicle rests on the jackstands and not on the control arms.
  6.  
  7. Remove the wheel and tire assembly.
  8.  


WARNING
Drive axle joint seal protectors should be used anytime service is performed on or near the drive axles. Failure to observe this could result in joint or seal failure.

  1. Place a modified inner drive joint seal protector on the drive axle joints.
  2.  
  3. Insert a drift punch through the rotor to keep it from moving, then remove the hub nut and washer.
  4.  

Clean all of the dirt and lubricant from the drive axle threads.

See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Removal and installation of the front wheel hub/drive shaft nut.

  1. Unbolt the caliper and support it out of the way with a suitable piece of wire. Do not disconnect the brake fluid line. For more details, refer to Brakes of this repair guide.
  2.  
  3. Remove the rotor.
  4.  
  5. Install a suitable front hub spindle removal tool, then separate the hub and drive axle.
  6.  

See Figure 2

Click image to see an enlarged view

Fig. Fig. 2: Use the proper tool to separate the drive axle from the hub

  1. Unfasten the three hub-and-bearing retaining bolts, then remove the shield, hub and bearing assembly and O-ring.
  2.  

See Figure 3

Click image to see an enlarged view

Fig. Fig. 3: The hub and bearing assembly is attached to the knuckle with retaining bolts

  1. To remove the seal, use a punch and tap the seal toward the engine. When the seal is removed from the steering knuckle, cut it off the drive axle using side cutters.
  2.  

The factory seal is installed from the engine side of the steering knuckle. The service replacement seal is installed from the wheel side of the steering knuckle.

To install:
  1. Install the new hub and bearing seal in the steering knuckle using the proper installer.
  2.  
  3. Lubricate the hub and bearing seal with grease.
  4.  
  5. Install a new O-ring around the hub and bearing assembly.
  6.  
  7. Install the hub and bearing assembly into the steering knuckle. Tighten the hub and bearing retaining bolts to 70 ft. lbs. (95 Nm).
  8.  
  9. Install the rotor and caliper. Tighten the caliper retaining bolts to 38 ft. lbs. (51 Nm).
  10.  
  11. Install the hub nut and washer.
  12.  
  13. Insert a drift punch through the rotor and caliper to keep the rotor from moving.
  14.  
  15. Tighten the hub nut to 185 ft. lbs. (260 Nm).
  16.  
  17. Remove the seal protectors.
  18.  
  19. Install the tire and wheel assembly.
  20.  
  21. Raise the vehicle slightly to allow removal of the jackstands, then carefully lower the vehicle.
  22.  

 
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