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

Manual Locking Hubs

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Removal & Installation



The engagement and disengagement of the hubs is a manual operation which must be performed at each hub assembly. The hubs should be placed FULLY in either Lock or Free position or damage will result.


WARNING
Do not place the transfer case in either 4-wheel mode unless the hubs are in the Lock position!

Locking hubs should be run in the Lock position periodically for a few miles to assure proper differential lubrication.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Wheels
     

  4.  
  5. Lock the hubs. Remove the outer retaining plate, Allen head bolts and take off the plate, O-ring, and knob assembly.

    External snapring from the axle shaft
     
    Compression spring
     
    Clutch cup
     
    O-ring and dial screw
     
    Clutch nut and seal
     
    Large internal snapring from the wheel hub
     
    Inner drive gear
     
    Clutch ring and spring
     
    Smaller internal snapring from the clutch hub body
     
    Hub body
     

  6.  
  7. Clean all hub parts in a safe, non-flammable solvent and wipe them dry.
  8.  
  9. Inspect each component for wear or damage. Make sure that the springs are functional and stiff. Make sure that all gear teeth are intact, with no chips or burrs.
  10.  
  11. Make sure that the splines on the inside of the wheel hub are clean and free of dirt, chips and burrs.
  12.  
  13. Surface irregularities can be cleaned up with light filing or emery paper.
  14.  
  15. Prior to assembly, coat all parts with the same wheel bearing grease.
  16.  

To install:

  1. Install or connect the following:

    Hub body
     
    Smaller internal snapring in the clutch hub body
     
    Clutch ring and spring
     
    Inner drive gear
     
    Large internal snapring in the wheel hub
     
    External snapring on the axle shaft. If the snapring groove is not completely visible, reach around, inside the knuckle and push the axle shaft outwards.
     
    Clutch nut and seal
     
    O-ring and dial screw
     
    Clutch cup
     
    Compression spring
     

  2.  
  3. Place the hub dial in the Lock position.
  4.  
  5. Coat the hub dial assembly O-ring with wheel bearing grease and position the hub dial and retainer on the hub.

    Allen head bolts. Make sure that you used any washers that were there originally. Torque these bolts to 45 inch lbs. (5 Nm)
     

  6.  
  7. Rotate the hub dial to the free position and turn the wheel hubs to make sure that the axle is free.

    Wheels
     

  8.  

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Wheels
     

  4.  
  5. Lock the hubs. Remove the outer retaining plate, Allen head bolts and take off the plate, O-ring, and knob assembly.

    External snapring from the axle shaft
     
    Compression spring
     
    Clutch cup
     
    O-ring and dial screw
     
    Clutch nut and seal
     
    Large internal snapring from the wheel hub
     
    Inner drive gear
     
    Clutch ring and spring
     
    Smaller internal snapring from the clutch hub body
     
    Hub body
     

  6.  
  7. Clean all hub parts in a safe, non-flammable solvent and wipe them dry.
  8.  
  9. Inspect each component for wear or damage. Make sure that the springs are functional and stiff. Make sure that all gear teeth are intact, with no chips or burrs.
  10.  
  11. Make sure that the splines on the inside of the wheel hub are clean and free of dirt, chips and burrs.
  12.  
  13. Surface irregularities can be cleaned up with light filing or emery paper.
  14.  
  15. Prior to assembly, coat all parts with the same wheel bearing grease.
  16.  

To install:

  1. Install or connect the following:

    Hub body
     
    Smaller internal snapring in the clutch hub body
     
    Clutch ring and spring
     
    Inner drive gear
     
    Large internal snapring in the wheel hub
     
    External snapring on the axle shaft. If the snapring groove is not completely visible, reach around, inside the knuckle and push the axle shaft outwards.
     
    Clutch nut and seal
     
    O-ring and dial screw
     
    Clutch cup
     
    Compression spring
     

  2.  
  3. Place the hub dial in the Lock position.
  4.  
  5. Coat the hub dial assembly O-ring with wheel bearing grease and position the hub dial and retainer on the hub.

    Allen head bolts. Make sure that you used any washers that were there originally. Torque these bolts to 45 inch lbs. (5 Nm)
     

  6.  
  7. Rotate the hub dial to the free position and turn the wheel hubs to make sure that the axle is free.

    Wheels
     

  8.  

The engagement and disengagement of the hubs is a manual operation which must be performed at each hub assembly. The hubs should be placed FULLY in either Lock or Free position or damage will result.


WARNING
Do not place the transfer case in either 4-wheel mode unless the hubs are in the Lock position!

Locking hubs should be run in the Lock position periodically for a few miles to assure proper differential lubrication.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Wheels
     

  4.  
  5. Lock the hubs. Remove the outer retaining plate, Allen head bolts and take off the plate, O-ring, and knob assembly.

    External snapring from the axle shaft
     
    Compression spring
     
    Clutch cup
     
    O-ring and dial screw
     
    Clutch nut and seal
     
    Large internal snapring from the wheel hub
     
    Inner drive gear
     
    Clutch ring and spring
     
    Smaller internal snapring from the clutch hub body
     
    Hub body
     

  6.  
  7. Clean all hub parts in a safe, non-flammable solvent and wipe them dry.
  8.  
  9. Inspect each component for wear or damage. Make sure that the springs are functional and stiff. Make sure that all gear teeth are intact, with no chips or burrs.
  10.  
  11. Make sure that the splines on the inside of the wheel hub are clean and free of dirt, chips and burrs.
  12.  
  13. Surface irregularities can be cleaned up with light filing or emery paper.
  14.  
  15. Prior to assembly, coat all parts with the same wheel bearing grease.
  16.  

To install:

  1. Install or connect the following:

    Hub body
     
    Smaller internal snapring in the clutch hub body
     
    Clutch ring and spring
     
    Inner drive gear
     
    Large internal snapring in the wheel hub
     
    External snapring on the axle shaft. If the snapring groove is not completely visible, reach around, inside the knuckle and push the axle shaft outwards.
     
    Clutch nut and seal
     
    O-ring and dial screw
     
    Clutch cup
     
    Compression spring
     

  2.  
  3. Place the hub dial in the Lock position.
  4.  
  5. Coat the hub dial assembly O-ring with wheel bearing grease and position the hub dial and retainer on the hub.

    Allen head bolts. Make sure that you used any washers that were there originally. Torque these bolts to 45 inch lbs. (5 Nm)
     

  6.  
  7. Rotate the hub dial to the free position and turn the wheel hubs to make sure that the axle is free.

    Wheels
     

  8.  

The engagement and disengagement of the hubs is a manual operation which must be performed at each hub assembly. The hubs should be placed FULLY in either Lock or Free position or damage will result.


WARNING
Do not place the transfer case in either 4-wheel mode unless the hubs are in the Lock position!

Locking hubs should be run in the Lock position periodically for a few miles to assure proper differential lubrication.

 
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