AMC Coupes/Sedans/Wagons 1975-1988 Repair Information

Hubs and Bearings

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REMOVAL & INSTALLATION



See Figures 1 through 6

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Fig. Fig. 1: Use a suitable puller to remove the rear hub



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Fig. Fig. 2: When installing a new rear hub and drum, tighten the shaft nut until the measurement is correct



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Fig. Fig. 3: Location of the inner wheel bearing and seal on rear drum brakes



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Fig. Fig. 4: Use a seal puller to remove the inner bearing seal ...



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Fig. Fig. 5: ... then remove the inner bearing from the brake drum



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Fig. Fig. 6: Use a seal installer and mallet to install the inner bearing seal in the drum

The rear axle splines cut serrations into the inner diameter of the rear wheel hub. If the hub is to be removed, matchmark the hub to the axle so that the job of aligning the serrations and splines will be easier. If this is not done, the axle will cut new splines which may be so near the old that the hub will move on the axle with resultant damage to the hub, axle, and differential gears.

When a new hub is installed, the serrations will be cut in the hub as it is installed on the shaft.

If a new axle shaft is installed, a new hub, without serrations, must be installed. And old shaft with a new hub also is an allowable combination.

  1. Remove the wheel and brake drum as detailed above.
  2.  
  3. Matchmark the hub and axle shaft.
  4.  
  5. Attach a suitable puller to the wheel hub to remove it.
  6.  


WARNING
Do not use a knockout type puller on the end of the axle shaft, as this could damage the wheel bearings or the thrust blocks. Use a screw type puller.

  1. Inspect the hub for faulty lug studs, a worn keyway or center bore, and damaged serrations. Replace the hub and drum if any of these are present or if it is cracked.
  2.  

The hub and drum must both be replaced if either one is defective.

  1. Installation, if the old hub and drum are being replaced, is performed in the reverse order of removal. Tighten the axle shaft nut to 250 ft. lbs. with the weight of the car resting on the rear wheels.
  2.  

Be sure to align the matchmarks made during removal.

A new hub and drum assembly must be installed in the following order:

  1. Align the hub keyway with the key on the axle shaft.
  2.  
  3. Slide the hub and drum onto the axle shaft as far as they will go.
  4.  
  5. Fit two well lubricated thrust washers over the axle shaft and install the axle shaft nut.
  6.  
  7. Install the wheel and lug nuts, remove the jackstands, and lower the car.
  8.  
  9. Tighten the axle shaft nut until the distance from the outer face of the hub to the outer end of the axle shaft is one of the following:

    7 9 / 16 in. (192mm) differential1.7 in. (43.18mm)
     
    8 7 / 8 in. (225mm) differential1.30 in. (33.02mm)
     

  10.  

If the hub is not pressed in to the proper specifications, the splines will be improperly cut.

  1. Remove the nut front the axle shaft and take off one of the thrust washers.
  2.  
  3. Reinstall the axle shaft nut and tighten it to 250 ft. lbs. If the cotter key cannot be inserted, tighten the nut to the next castellation and install the key.
  4.  

 
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