AutoZone 2000 Buick Park Avenue Ultra 3.8L FI SC OHV 6cyl | Repair Guides | Drive Train | Rear Axle | Axle Shaft, Bearing & Seal 1 | AutoZone.com

Search suggestions

    My Vehicles

    2000 Buick Park Avenue Ultra 3.8L FI SC OHV 6cyl

    My Store

    405 N COLLEGE ST
    (479) 443-4043

    OPEN 'til 10:00 PM today

    Save 20% Sitewide

    Use Code: YOUCHOOSE20

    See Details

    Get A $25 Gift Card

    Use Code: YOUCHOOSE25

    See Details

    Avalanche, Sierra, Silverado, C&K Series, 1999-2005

    Axle Shaft, Bearing & Seal 1

    Print

    Removal & Installation



    10.5 in. & 11.5 In. Axles
    1. Remove or disconnect the following:

      Tire and wheel
       
      Brake caliper
       
      Brake rotor
       
      Flange bolts

      Click image to see an enlarged view

      Fig. Rear axle shaft removal-10.5 and 11.5 inch axles

       

    2.  
    3. Lightly rap the axle shaft with a soft-faced hammer in order to loosen the shaft. Grip the rib on the axle shaft flange with a locking pliers. Twist the axle shaft flange in order to start the axle shaft removal. Remove the axle shaft from the tube.
    4.  
    5. Remove the gasket.
    6.  
    7. Clean the axle shaft flange and the outside face of the hub assembly. Inspect all the parts. Replace the parts as necessary.
    8.  

    To install:

    1. Install or connect the following:

      Gasket onto the axle shaft
       
      Gasket and axle shaft into the tube. Ensure the shaft splines mesh into the differential side gear. Align the holes in the axle flange and the gasket with the holes in the hub.
       
      Axle flange bolts and tighten to 110 ft. lbs. (150 Nm).
       
      Rotor
       
      Caliper
       
      Wheel and tire
       

    2.  

    1. Remove or disconnect the following:

      Tire and wheel
       
      Brake caliper
       
      Brake rotor
       
      Flange bolts

      Click image to see an enlarged view

      Fig. Rear axle shaft removal-10.5 and 11.5 inch axles

       

    2.  
    3. Lightly rap the axle shaft with a soft-faced hammer in order to loosen the shaft. Grip the rib on the axle shaft flange with a locking pliers. Twist the axle shaft flange in order to start the axle shaft removal. Remove the axle shaft from the tube.
    4.  
    5. Remove the gasket.
    6.  
    7. Clean the axle shaft flange and the outside face of the hub assembly. Inspect all the parts. Replace the parts as necessary.
    8.  

    To install:

    1. Install or connect the following:

      Gasket onto the axle shaft
       
      Gasket and axle shaft into the tube. Ensure the shaft splines mesh into the differential side gear. Align the holes in the axle flange and the gasket with the holes in the hub.
       
      Axle flange bolts and tighten to 110 ft. lbs. (150 Nm).
       
      Rotor
       
      Caliper
       
      Wheel and tire
       

    2.  

    10.5 Inch Rear Axle
    1. Remove or disconnect the following:

      Tire and wheel
       
      Brake caliper
       
      Brake rotor
       
      Flange bolts

      Click image to see an enlarged view

      Fig. Rear axle shaft removal-10.5 inch 25 Series Silverado

       

    2.  
    3. Lightly rap the axle shaft with a soft-faced hammer in order to loosen the shaft. Grip the rib on the axle shaft flange with a locking pliers. Twist the axle shaft flange in order to start the axle shaft removal. Remove the axle shaft from the tube.
    4.  
    5. Remove the gasket.
    6.  
    7. Clean the axle shaft flange and the outside face of the hub assembly. Inspect all the parts. Replace the parts as necessary.
    8.  

    To install:

    1. Install or connect the following:

      Gasket onto the axle shaft
       
      Gasket and axle shaft into the tube. Ensure the shaft splines mesh into the differential side gear. Align the holes in the axle flange and the gasket with the holes in the hub.
       
      Axle flange bolts and tighten to 110 ft. lbs. (150 Nm).
       
      Rotor
       
      Caliper
       
      Wheel and tire
       

    2.  

    8.5 Inch & 9.5 Inch Axles
    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove or disconnect the following:

      Tire and wheel assembly
       
      Brake caliper
       
      Rear cover and the gasket
       
      Pinion shaft locking screw.
       
      Pinion shaft, on axles without locking differential
       

    4.  
    5. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    6.  
    7. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    8.  
    9. Push the flange of the axle shaft toward the differential. Remove the lock from the button end of the axle shaft.
      NOTE
      When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make the assembly difficult.

    10.  
    11. Remove the axle shaft from the housing.
    12.  
    13. If replacing only the axle shaft seal, remove the seal using a suitable seal removal tool.
    14.  
    15. Remove the bearing using a bearing remover.
    16.  
    17. Inspect all the parts for damage. Replace the parts as necessary.

      Click image to see an enlarged view

      Fig. Exploded view of the rear axle-8.5/8.6/9.5 inch

    18.  

    To install:

    1. Install a new bearing using a bearing installer.
    2.  
    3. Install new seal using a seal installer. Ensure the seal is fully seated in the axle tube.
      NOTE
      Carefully insert the axle shaft in order to not damage the seal.

    4.  
    5. Install the axle shaft into the housing. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    6.  
    7. On axles without a locking differential, place the lock on the button end of the axle shaft.
    8.  
    9. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    10.  
    11. On axles with a locking differential, place the lock on the axle shaft so that the ends are flush with the thrust block. Pull the shaft flange outward in order to seat the lock in the differential gear.
      NOTE
      Anytime you remove a differential pinion shaft locking screw, coat the screw threads with Loctite® 242 before reinstalling the screws. The screw has an adhesive coating in order to prevent the screw from loosening in the case. Removing the screw removes the adhesive on the screw.

    12.  
    13. Align the hole in the pinion shaft with the screw hole in the differential case.
    14.  
    15. Install or connect the following:

      Pinion flange locking bolt and tighten to 25 ft. lbs. (34 Nm).
       
      Rear cover and the gasket
       
      Brake caliper
       
      Tire and wheel assembly
       

    16.  
    17. Fill the rear axle.
    18.  
    19. Remove the supports and lower the vehicle.
    20.  

    8.6 in. & 9.5 in. Axles
    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove the tire and wheel assembly.
    4.  
    5. Remove the brake caliper on disc brake models.
    6.  
    7. Remove the rear cover and gasket.
    8.  
    9. Remove the pinion shaft locking bolt.
    10.  
    11. On axles without a locking differential, remove the pinion shaft.
    12.  
    13. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    14.  
    15. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    16.  
    17. Push the flange of the axle shaft in toward the differential.
    18.  
    19. Remove the C-lock from the button end of the axle shaft.
    20.  
    21. When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make assembly difficult.
    22.  
    23. Remove the axle shaft from the housing.

      Click image to see an enlarged view

      Fig. Exploded view of the rear axle assembly-8.6 and 9.5 inch axles

    24.  

    To install:

    1. Install the axle shaft into the rear axle housing.
    2.  
    3. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    4.  
    5. On axles without a locking differential, place the C-lock on the button end of the axle shaft.
    6.  
    7. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    8.  
    9. Install the brake drum on drum brake models.
    10.  
    11. On axles with a locking differential, place the C-lock on the axle shaft so that the ends are flush with the thrust block.
    12.  
    13. Pull the shaft flange outward in order to seat the lock in the differential gear.
    14.  
    15. Align the hole in the pinion shaft with the bolt hole in the differential case.
    16.  
    17. Install the new pinion shaft locking bolt and tighten to 27 ft. lbs. (36 Nm) on 8.5 inch axles or 37 ft. lbs. (50 Nm) on 9.5 inch axles.
    18.  
    19. Install the rear cover and the gasket.
    20.  
    21. Install the caliper on disc brake models.
    22.  
    23. Install the tire and wheel assembly.
    24.  
    25. Fill the rear axle, using the proper fluid.
    26.  
    27. Lower the vehicle.
    28.  

    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove the tire and wheel assembly.
    4.  
    5. Remove the brake caliper on disc brake models.
    6.  
    7. Remove the rear cover and gasket.
    8.  
    9. Remove the pinion shaft locking bolt.
    10.  
    11. On axles without a locking differential, remove the pinion shaft.
    12.  
    13. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    14.  
    15. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    16.  
    17. Remove the brake drum on drum brake models.
    18.  
    19. Push the flange of the axle shaft in toward the differential.
    20.  
    21. Remove the C-lock from the button end of the axle shaft.
    22.  
    23. When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make assembly difficult.
    24.  
    25. Remove the axle shaft from the housing.

      Click image to see an enlarged view

      Fig. Exploded view of the rear axle assembly-8.6 and 9.5 inch axles

    26.  

    To install:

    1. Install the axle shaft into the rear axle housing.
    2.  
    3. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    4.  
    5. On axles without a locking differential, place the C-lock on the button end of the axle shaft.
    6.  
    7. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    8.  
    9. Install the brake drum on drum brake models.
    10.  
    11. On axles with a locking differential, place the C-lock on the axle shaft so that the ends are flush with the thrust block.
    12.  
    13. Pull the shaft flange outward in order to seat the lock in the differential gear.
    14.  
    15. Align the hole in the pinion shaft with the bolt hole in the differential case.
    16.  
    17. Install the new pinion shaft locking bolt and tighten to 27 ft. lbs. (36 Nm) on 8.5 inch axles or 37 ft. lbs. (50 Nm) on 9.5 inch axles.
    18.  
    19. Install the rear cover and the gasket.
    20.  
    21. Install the caliper on disc brake models.
    22.  
    23. Install the tire and wheel assembly.
    24.  
    25. Fill the rear axle, using the proper fluid.
    26.  
    27. Lower the vehicle.
    28.  

    8.6 Inch Rear Axle
    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove the tire and wheel assembly.
    4.  
    5. Remove the brake caliper on disc brake models.
    6.  
    7. Remove the rear cover and gasket.
    8.  
    9. Remove the pinion shaft locking bolt.
    10.  
    11. On axles without a locking differential, remove the pinion shaft.
    12.  
    13. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    14.  
    15. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    16.  
    17. Remove the brake drum on drum brake models.
    18.  
    19. Push the flange of the axle shaft in toward the differential.
    20.  
    21. Remove the C-lock from the button end of the axle shaft.
    22.  
    23. When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make assembly difficult.
    24.  
    25. Remove the axle shaft from the housing.
    26.  

    To install:

    1. Install the axle shaft into the rear axle housing.
    2.  
    3. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    4.  
    5. On axles without a locking differential, place the C-lock on the button end of the axle shaft.
    6.  
    7. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    8.  
    9. Install the brake drum on drum brake models.
    10.  
    11. On axles with a locking differential, place the C-lock on the axle shaft so that the ends are flush with the thrust block.
    12.  
    13. Pull the shaft flange outward in order to seat the lock in the differential gear.
    14.  
    15. Align the hole in the pinion shaft with the bolt hole in the differential case.
    16.  
    17. Install the new pinion shaft locking bolt and tighten to 25 ft. lbs. (35 Nm).
    18.  
    19. Install the rear cover and the gasket.
    20.  
    21. Install the caliper on disc brake models.
    22.  
    23. Install the tire and wheel assembly.
    24.  
    25. Fill the rear axle, using the proper fluid.
    26.  
    27. Lower the vehicle.
    28.  

    8.6 Inch With Drum Brakes
    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove or disconnect the following:

      Tire and wheel assembly
       
      Rear cover and the gasket
       
      Pinion shaft locking screw.
       
      Pinion shaft, on axles without locking differential
       

    4.  
    5. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    6.  
    7. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    8.  
    9. Remove the brake drum.
    10.  
    11. Push the flange of the axle shaft toward the differential. Remove the lock from the button end of the axle shaft.
      NOTE
      When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make the assembly difficult.

    12.  
    13. Remove the axle shaft from the housing.
    14.  
    15. If replacing only the axle shaft seal, remove the seal using a suitable seal removal tool.
    16.  
    17. Remove the bearing using a bearing remover.
    18.  
    19. Inspect all the parts for damage. Replace the parts as necessary.

      Click image to see an enlarged view

      Fig. Exploded view of the rear axle-8.6 inch with drum brakes

    20.  

    To install:

    1. Install a new bearing using a bearing installer.
    2.  
    3. Install new seal using a seal installer. Ensure the seal is fully seated in the axle tube.
      NOTE
      Carefully insert the axle shaft in order to not damage the seal.

    4.  
    5. Install the axle shaft into the housing. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    6.  
    7. On axles without a locking differential, place the lock on the button end of the axle shaft.
    8.  
    9. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    10.  
    11. Install the brake drum.
    12.  
    13. On axles with a locking differential, place the lock on the axle shaft so that the ends are flush with the thrust block. Pull the shaft flange outward in order to seat the lock in the differential gear.
      NOTE
      Anytime you remove a differential pinion shaft locking screw, coat the screw threads with Loctite® 242 before reinstalling the screws. The screw has an adhesive coating in order to prevent the screw from loosening in the case. Removing the screw removes the adhesive on the screw.

    14.  
    15. Align the hole in the pinion shaft with the screw hole in the differential case.
    16.  
    17. Install or connect the following:

      Pinion flange locking bolt and tighten to 25 ft. lbs. (34 Nm).
       
      Rear cover and the gasket
       
      Tire and wheel assembly
       

    18.  
    19. Fill the rear axle.
    20.  
    21. Remove the supports and lower the vehicle.
    22.  

    1. Raise and support the vehicle on a hoist.
    2.  
    3. Remove or disconnect the following:

      Tire and wheel assembly
       
      Rear cover and the gasket
       
      Pinion shaft locking screw.
       
      Pinion shaft, on axles without locking differential
       

    4.  
    5. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
    6.  
    7. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the lock until the lock aligns with the thrust block.
    8.  
    9. Remove the brake drum.
    10.  
    11. Push the flange of the axle shaft toward the differential. Remove the lock from the button end of the axle shaft.
      NOTE
      When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make the assembly difficult.

    12.  
    13. Remove the axle shaft from the housing.
    14.  
    15. If replacing only the axle shaft seal, remove the seal using a suitable seal removal tool.
    16.  
    17. Remove the bearing using a bearing remover.
    18.  
    19. Inspect all the parts for damage. Replace the parts as necessary.

      Click image to see an enlarged view

      Fig. Exploded view of the rear axle-8.6 inch with drum brakes

    20.  

    To install:

    1. Install a new bearing using a bearing installer.
    2.  
    3. Install new seal using a seal installer. Ensure the seal is fully seated in the axle tube.
      NOTE
      Carefully insert the axle shaft in order to not damage the seal.

    4.  
    5. Install the axle shaft into the housing. Slide the axle shaft into place allowing the splines to engage the differential side gear.
    6.  
    7. On axles without a locking differential, place the lock on the button end of the axle shaft.
    8.  
    9. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    10.  
    11. Install the brake drum.
    12.  
    13. On axles with a locking differential, place the lock on the axle shaft so that the ends are flush with the thrust block. Pull the shaft flange outward in order to seat the lock in the differential gear.
      NOTE
      Anytime you remove a differential pinion shaft locking screw, coat the screw threads with Loctite® 242 before reinstalling the screws. The screw has an adhesive coating in order to prevent the screw from loosening in the case. Removing the screw removes the adhesive on the screw.

    14.  
    15. Align the hole in the pinion shaft with the screw hole in the differential case.
    16.  
    17. Install or connect the following:

      Pinion flange locking bolt and tighten to 25 ft. lbs. (34 Nm).
       
      Rear cover and the gasket
       
      Tire and wheel assembly
       

    18.  
    19. Fill the rear axle.
    20.  
    21. Remove the supports and lower the vehicle.
    22.  

    9.75 Inch Axles
    1. Release the parking brake.
    2.  
    3. Raise and support the vehicle.
    4.  
    5. Remove the tire and wheel assembly.
    6.  
    7. Remove the rear steering gear assembly.
    8.  
    9. Remove the steering knuckle assembly.
    10.  
    11. Remove the lock clip from the axle shaft end. The lock clip is spring loaded and fits securely in the axle shaft slot and may need to be push off the shaft end with a screw driver or related tool. Pushing the axle shaft inwards towards the gears my help in removal of the lock clip.
    12.  
    13. When removing the axle shaft do not rotate the shaft. Rotating the shaft will cause the gears to move. Misalignment of the gears will make the assembly difficult.
    14.  
    15. Remove the axle shaft.
    16.  

    To install:

    1. Install the axle shaft.
    2.  
    3. Install the spring loaded lock clip to the axle shaft end.
    4.  
    5. Install the steering knuckle assembly.
    6.  
    7. Install the rear steering gear assembly.
    8.  
    9. Install the tire and wheel assembly.
    10.  
    11. Lower the vehicle.
    12.  

    1. Release the parking brake.
    2.  
    3. Raise and support the vehicle.
    4.  
    5. Remove the tire and wheel assembly.
    6.  
    7. Remove the rear steering gear assembly.
    8.  
    9. Remove the steering knuckle assembly.
    10.  
    11. Remove the lock clip from the axle shaft end. The lock clip is spring loaded and fits securely in the axle shaft slot and may need to be push off the shaft end with a screw driver or related tool. Pushing the axle shaft inwards toward the gears my help in removal of the lock clip.
    12.  
    13. When removing the axle shaft do not rotate the shaft. Rotating the shaft will cause the gears to move. Misalignment of the gears will make the assembly difficult.
    14.  
    15. Remove the axle shaft.

      Click image to see an enlarged view

      Fig. Removing the lock clip-9.75 inch axles

    16.  

    To install:

    1. Install the axle shaft.
    2.  
    3. Install the spring loaded lock clip to the axle shaft end.
    4.  
    5. Install the steering knuckle assembly.
    6.  
    7. Install the rear steering gear assembly.
    8.  
    9. Install the tire and wheel assembly.
    10.  
    11. Lower the vehicle.
    12.  

    1. Release the parking brake.
    2.  
    3. Raise and support the vehicle.
    4.  
    5. Remove the tire and wheel assembly.
    6.  
    7. Remove the rear steering gear assembly.
    8.  
    9. Remove the steering knuckle assembly.
    10.  
    11. Remove the lock clip from the axle shaft end. The lock clip is spring loaded and fits securely in the axle shaft slot and may need to be push off the shaft end with a screw driver or related tool. Pushing the axle shaft inwards towards the gears my help in removal of the lock clip.
    12.  
    13. When removing the axle shaft do not rotate the shaft. Rotating the shaft will cause the gears to move. Misalignment of the gears will make the assembly difficult.
    14.  
    15. Remove the axle shaft.

      Click image to see an enlarged view

      Fig. Removing the lock clip-9.75 inch axles

    16.  

    To install:

    1. Install the axle shaft.
    2.  
    3. Install the spring loaded lock clip to the axle shaft end.
    4.  
    5. Install the steering knuckle assembly.
    6.  
    7. Install the rear steering gear assembly.
    8.  
    9. Install the tire and wheel assembly.
    10.  
    11. Lower the vehicle.
    12.  

    Full-Floating Axles

    The procedures are the same for locking and non-locking axles.

    The best way to remove the bearings from the wheel hub is with an arbor press. Use of a press reduces the chances of damaging the bearing races, cocking the bearing in its bore, or scoring the hub walls. A local machine shop is probably equipped with the tools to remove and install bearings and seals. However, if one is not available, the hammer and drift method outlined can be used.

    1. Support the axles on jack stands.
    2.  
    3. Remove the wheels.
    4.  
    5. Remove the bolts and lock washers that attach the axle shaft flange to the hub.

      Click image to see an enlarged view

      Fig. Exploded view of the axle, hub and drum assembly-full-floating axle, 93/4 and 101/2 in.



      Click image to see an enlarged view

      Fig. Removing the bearing adjusting nut-full-floating axle, 93/4 and 101/2 in.



      Click image to see an enlarged view

      Fig. Removing the bearing outer cup-full-floating axle, 93/4 and 101/2 in.



      Click image to see an enlarged view

      Fig. Tightening the adjusting nut-full-floating axle, 93/4 and 101/2 in.



      Click image to see an enlarged view

      Fig. Exploded view of the axle and hub assembly-full-floating axle, 12 in.



      Click image to see an enlarged view

      Fig. Removing the axle shaft-full-floating axle, 12 in.



      Click image to see an enlarged view

      Fig. Removing the wheel bearing nut-full-floating axle, 12 in.

    6.  
    7. Rap on the flange with a soft faced hammer to loosen the shaft. Grip the rib on the end of the flange with a pair of locking pliers and twist to start shaft removal. Remove the shaft from the axle tube.
    8.  
    9. The hub and drum assembly must be removed to remove the bearings and oil seals. You will need a large socket to remove and later adjust the bearing adjustment nut. There are also special tools available.
    10.  
    11. Disengage the tang of the locknut retainer from the slot or slat of the locknut, then remove the locknut from the housing tube.
    12.  
    13. Disengage the tang of the retainer from the slot or flat of the adjusting nut and remove the retainer from the housing tube.
    14.  
    15. Remove the adjusting nut from the housing tube.
    16.  
    17. Remove the thrust washer from the housing tube.
    18.  
    19. Pull the hub and drum straight off the axle housing.
    20.  
    21. Remove the oil seal and discard.
    22.  
    23. Use a hammer and a long drift to knock the inner bearing, cup, and oil seal from the hub assembly.
    24.  
    25. Remove the outer bearing snapring with a pair of pliers. It may be necessary to tap the bearing outer race away from the retaining ring slightly by tapping on the ring to remove the ring.
    26.  
    27. Drive the outer bearing from the hub with a hammer and drift.
    28.  

    To install:

    1. Place the outer bearing into the hub. The larger outside diameter of the bearing should face the outer end of the hub. Drive the bearing into the hub using a washer that will cover both the inner and outer races of the bearing. Place a socket on top of this washer, then drive the bearing into place with a series of light taps. If available, an arbor press should be used for this job.
    2.  
    3. Drive the bearing past the snapring groove, and install the snapring. Then, turning the hub assembly over, drive the bearing back against the snapring. Protect the bearing by placing a washer on top of it. You can use the thrust washer that fits between the bearing and the adjusting nut for the job.
    4.  
    5. Place the inner bearing into the hub. The thick edge should be toward the shoulder in the hub. Press the bearing into the hub until it seats against the shoulder, using a washer and socket as outlined earlier. Make certain that the bearing is not cocked and that it is fully seated on the shoulder.
    6.  
    7. Pack the cavity between the oil seal lips with wheel bearing grease, and position it in the hub bore. Carefully press it into place on top of the inner bearing.
    8.  
    9. Pack the wheel bearings with grease, and lightly coat the inside diameter of the hub bearing contact surface and the outside diameter of the axle housing tube.
    10.  
    11. Make sure that the inner bearing, oil seal, axle housing oil deflector, and outer bearing are properly positioned. Install the hub and drum assembly on the axle housing, being careful so as not to damage the oil seal or dislocate other internal components.
    12.  
    13. Install the thrust washer so that the tang on the inside diameter of the washer is in the keyway on the axle housing.
    14.  
    15. Install the adjusting nut. Tighten to 50 ft. lbs. (68 Nm) while rotating the hub. Back off the nut 1 / 4 turn and retighten to 35 ft. lbs. (47 Nm) on models with the 11 inch ring gear and 13 ft. lbs. (17 Nm) on models with the 10 1 / 2 inch ring gear.
    16.  
    17. Install the tanged retainer against the inner adjusting nut. Align the adjusting nut so that the short tang of the retainer will engage the nearest slot on the adjusting nut.
    18.  
    19. Install the outer locknut and tighten to 65 ft. lbs. (88 Nm). Bend the long tang of the retainer into the slot of the outer nut. This method of adjustment should provide 0.001-0.010 in. (0.0254-0.254mm) end-play.
    20.  
    21. Place a new gasket over the axle shaft and position the axle shaft in the housing so that the shaft splines enter the differential side gear. Position the gasket so that the holes are in alignment, and install the flange-to-hub attaching bolts. Tighten to 115 ft. lbs. (156 Nm) on models with the 10 1 / 2 inch ring gear and tighten the axle cap bolts on models with the 11 inch ring gear to 15 ft. lbs. (20 Nm).
      NOTE
      To prevent lubricant from leaking through the flange holes, apply a non-hardening sealer to the bolt threads. Use the sealer sparingly.

    22.  
    23. Replace the wheels.
    24.  

    The procedures are the same for locking and non-locking axles.

    The best way to remove the bearings from the wheel hub is with an arbor press. Use of a press reduces the chances of damaging the bearing races, cocking the bearing in its bore, or scoring the hub walls. A local machine shop is probably equipped with the tools to remove and install bearings and seals. However, if one is not available, the hammer and drift method outlined can be used.

    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Support the axles on jackstands.
    4.  
    5. Remove the wheels.
    6.  
    7. Remove the bolts and lock washers that attach the axle shaft flange to the hub.

      Click image to see an enlarged view

      Fig. Exploded view of the axle, hub and drum assembly-full-floating axle, 93/4 and 101/2 in.-1999 models



      Click image to see an enlarged view

      Fig. Removing the bearing adjusting nut-full-floating axle, 93/4 and 101/2 in.-1999 models



      Click image to see an enlarged view

      Fig. Removing the bearing outer cup-full-floating axle, 93/4 and 101/2 in.-1999 models



      Click image to see an enlarged view

      Fig. Tightening the adjusting nut-full-floating axle, 93/4 and 101/2 in.-1999 models



      Click image to see an enlarged view

      Fig. Exploded view of the axle and hub assembly-full-floating axle, 12 in.-1999 models



      Click image to see an enlarged view

      Fig. Removing the axle shaft-full-floating axle, 12 in.-1999 models



      Click image to see an enlarged view

      Fig. Removing the wheel bearing nut-full-floating axle, 12 in.-1999 models

    8.  
    9. Rap on the flange with a soft faced hammer to loosen the shaft. Grip the rib on the end of the flange with a pair of locking pliers and twist to start shaft removal. Remove the shaft from the axle tube.
    10.  
    11. The hub and drum assembly must be removed to remove the bearings and oil seals. You will need a large socket to remove and later adjust the bearing adjustment nut. There are also special tools available.
    12.  
    13. Disengage the tang of the locknut retainer from the slot or slat of the locknut, then remove the locknut from the housing tube.
    14.  
    15. Disengage the tang of the retainer from the slot or flat of the adjusting nut and remove the retainer from the housing tube.
    16.  
    17. Remove the adjusting nut from the housing tube.
    18.  
    19. Remove the thrust washer from the housing tube.
    20.  
    21. Pull the hub and drum straight off the axle housing.
    22.  
    23. Remove the oil seal and discard.
    24.  
    25. Use a hammer and a long drift to knock the inner bearing, cup, and oil seal from the hub assembly.
    26.  
    27. Remove the outer bearing snapring with a pair of pliers. It may be necessary to tap the bearing outer race away from the retaining ring slightly by tapping on the ring to remove the ring.
    28.  
    29. Drive the outer bearing from the hub with a hammer and drift.
    30.  

    To install:

    1. Place the outer bearing into the hub. The larger outside diameter of the bearing should face the outer end of the hub. Drive the bearing into the hub using a washer that will cover both the inner and outer races of the bearing. Place a socket on top of this washer, then drive the bearing into place with a series of light taps. If available, an arbor press should be used for this job.
    2.  
    3. Drive the bearing past the snapring groove, and install the snapring. Then, turning the hub assembly over, drive the bearing back against the snapring. Protect the bearing by placing a washer on top of it. You can use the thrust washer that fits between the bearing and the adjusting nut for tool Job.
    4.  
    5. Place the inner bearing into the hub. The thick edge should be toward the shoulder in the hub. Press the bearing into the hub until it seats against the shoulder, using a washer and socket as outlined earlier. Make certain that the bearing is not cocked and that it is fully seated on the shoulder.
    6.  
    7. Pack the cavity between the oil seal lips with wheel bearing grease, and position it in the hub bore. Carefully press it into place on top of the inner bearing.
    8.  
    9. Pack the wheel bearings with grease, and lightly coat the inside diameter of the hub bearing contact surface and the outside diameter of the axle housing tube.
    10.  
    11. Make sure that the inner bearing, oil seal, axle housing oil deflector, and outer bearing are properly positioned. Install the hub and drum assembly on the axle housing, being careful so as not to damage the oil seal or dislocate other internal components.
    12.  
    13. Install the thrust washer so that the tang on the inside diameter of the washer is in the keyway on the axle housing.
    14.  
    15. Install the adjusting nut. Tighten to 50 ft. lbs. (68 Nm) while rotating the hub. Back off the nut 1 / 4 turn and retighten to 35 ft. lbs. (47 Nm) on models with the 11 inch ring gear and 13 ft. lbs. (17 Nm) on models with the 10 1 / 2 inch ring gear.
    16.  
    17. Install the tanged retainer against the inner adjusting nut. Align the adjusting nut so that the short tang of the retainer will engage the nearest slot on the adjusting nut.
    18.  
    19. Install the outer locknut and tighten to 65 ft. lbs. (88 Nm). Bend the long tang of the retainer into the slot of the outer nut. This method of adjustment should provide 0.001-0.010 in. (0.0254-0.254mm) end-play.
    20.  
    21. Place a new gasket over the axle shaft and position the axle shaft in the housing so that the shaft splines enter the differential side gear. Position the gasket so that the holes are in alignment, and install the flange-to-hub attaching bolts. Tighten to 115 ft. lbs. (156 Nm) on models with the 10 1 / 2 inch ring gear and tighten the axle cap bolts on models with the 11 inch ring gear to 15 ft. lbs. (20 Nm).
      NOTE
      To prevent lubricant from leaking through the flange holes, apply a non-hardening sealer to the bolt threads. Use the sealer sparingly.

    22.  
    23. Replace the wheels.
    24.  

    Semi-Floating Locking Differentials

    This axle uses a thrust block on the differential pinion shaft.

    1. Remove the wheels and brake drums.
    2.  
    3. Clean off the differential cover area, loosen the cover to drain the lubricant, and remove the cover.

      Click image to see an enlarged view

      Fig. Positioning the case for the best clearance-semi-floating axle w/locking differential



      Click image to see an enlarged view

      Fig. Aligning the lock-semi-floating axle w/locking differential

    4.  
    5. Rotate the differential case so that you can remove the lockscrew and support the pinion shaft so it can't fall into the housing. Remove the differential pinion shaft lockscrew.
    6.  
    7. Carefully pull the pinion shaft partway out and rotate the differential case until the shaft touches the housing at the top.
    8.  
    9. Use a screwdriver to position the C-lock with its open end directly inward. You can't push in the axle shaft till you do this.
    10.  
    11. Push the axle shaft in and remove the C-lock.
    12.  
    13. Remove the shaft, being careful of the oil seal.
    14.  
    15. You can pry the oil seal out of the housing by placing the inner end of the axle shaft behind the steel case of the seal, then prying it out carefully.
    16.  
    17. A puller or a slide hammer is required to remove the bearing from the housing.
    18.  

    To install:

    1. Pack the new or reused bearing with wheel bearing grease and lubricate the cavity between the seal lips with the same grease.
    2.  
    3. The bearing has to be driven into the housing. Don't use a drift, you might cock the bearing in its bore. Use a piece of pipe or a large socket instead. Drive only on the outer bearing race. In a similar manner, drive the seal in flush with the end of the tube.
    4.  
    5. Slide the shaft into place, turning it slowly until the splines are engaged with the differential. Be careful of the oil seal.
    6.  
    7. Keep the pinion shaft partway out of the differential case while installing the C-lock on the axle shaft. Put the C-lock on the axle shaft and carefully pull out on the axle shaft until the C-lock is clear of the thrust block.
    8.  
    9. Position the differential pinion shaft through the case and the pinion gears, aligning the lockscrew hole. Install the lockscrew.
    10.  
    11. Install the cover with a new gasket and tighten the bolts evenly in a criss-cross pattern.
    12.  
    13. Fill the axle with lubricant.
    14.  
    15. Replace the brake drums and wheels.
    16.  

    This axle uses a thrust block on the differential pinion shaft.

    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Remove the wheels and brake drums.
    4.  
    5. Clean off the differential cover area, loosen the cover to drain the lubricant, and remove the cover.

      Click image to see an enlarged view

      Fig. Positioning the case for the best clearance-semi-floating axle w/locking differential-1999 models



      Click image to see an enlarged view

      Fig. Aligning the lock-semi-floating axle w/locking differential-1999 models

    6.  
    7. Rotate the differential case so that you can remove the lockscrew and support the pinion shaft so it can't fall into the housing. Remove the differential pinion shaft lockscrew.
    8.  
    9. Carefully pull the pinion shaft partway out and rotate the differential case until the shaft touches the housing at the top.
    10.  
    11. Use a screwdriver to position the C-lock with its open end directly inward. You can't push in the axle shaft till you do this.
    12.  
    13. Push the axle shaft in and remove the C-lock.
    14.  
    15. Remove the shaft, being careful of the oil seal.
    16.  
    17. You can pry the oil seal out of the housing by placing the inner end of the axle shaft behind the steel case of the seal, then prying it out carefully.
    18.  
    19. A puller or a slide hammer is required to remove the bearing from the housing.
    20.  

    To install:

    1. Pack the new or reused bearing with wheel bearing grease and lubricate the cavity between the seal lips with the same grease.
    2.  
    3. The bearing has to be driven into the housing. Don't use a drift, you might cock the bearing in its bore. Use a piece of pipe or a large socket instead. Drive only on the outer bearing race. In a similar manner, drive the seal in flush with the end of the tube.
    4.  
    5. Slide the shaft into place, turning it slowly until the splines are engaged with the differential. Be careful of the oil seal.
    6.  
    7. Keep the pinion shaft partway out of the differential case while installing the C-lock on the axle shaft. Put the C-lock on the axle shaft and carefully pull out on the axle shaft until the C-lock is clear of the thrust block.
    8.  
    9. Position the differential pinion shaft through the case and the pinion gears, aligning the lockscrew hole. Install the lockscrew.
    10.  
    11. Install the cover with a new gasket and tighten the bolts evenly in a criss-cross pattern.
    12.  
    13. Fill the axle with lubricant.
    14.  
    15. Replace the brake drums and wheels.
    16.  

     
    AutoZone Logo