GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Pinion Seal

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REMOVAL & INSTALLATION



Special tool required -J 42066 Wheel Bearing Hub Flange Holding Tool

  1. Raise and safely support the vehicle securely.
  2.  
  3. Remove the propeller shaft front the rear axle.
  4.  
  5. Remove the propeller shaft coupling from the rear axle.
  6.  
  7. The flange run-out is minimized and the pinion bearing preload is maintained by reassembling in the original position. Lightly center punch the alignment marks on the following as an aid for reassembly:
    1. On the differential drive pinion flange nut.
    2.  
    3. On the differential drive pinion flange.
    4.  
    5. On the differential drive pinion gear end.
    6.  

  8.  
  9. Install the tool J 42066 onto hold the differential drive pinion flange.
  10.  
  11. Remove the differential drive pinion flange nut.
  12.  
  13. Disengage the tool.
  14.  
  15. Install a universal gear puller to the pinion flange.
  16.  
  17. Remove the pinion flange from the differential drive pinion gear.
  18.  


NOTE
Position the drift punch on an angle to drive the seal inward away from the housing surface to prevent affecting the surface condition of the housing. Take care not to damage the differential housing as this could result in a leak after reassembly.

  1. Use a drift punch and use a deadblow hammer to remove the differential drive pinion oil seal from the rear axle housing.
  2.  

To install:

Special tool required -J 42108 Pinion Seal Driver

  1. Lubricate the new seal with rear axle lubricant.
  2.  
  3. Lightly coat the outside of the replacement seal with non-hardening gasket cement.
  4.  
  5. Use the tool to drive the seal over the pinion gear squarely into the rear axle housing until the tool bottoms on the differential housing.
  6.  
  7. Ensure that the drive pinion gear shaft threads are free from burrs.
  8.  
  9. Coat the splines with the recommended rear axle lubricant.
  10.  
  11. Seal the surface of the pinion flange with rear axle lubricant.
  12.  


NOTE
It is essential that the following method be used when installing a new pinion flange and/or pinion flange nut due to the production tolerances in the length of the pinion flange.

  1. Install the differential drive pinion flange onto the differential drive pinion gear.
  2.  


NOTE
The pinion flange has an interference fit on the pinion gear shaft splines. The pinion flange should only be pulled into place by tightening the retaining nut. DO NOT USE FORCE OR HAMMER THE FLANGE DURING THE INSTALLATION OF THE DRIVE PINION FLANGE ONTO THE DRIVE PINION.

  1. Install the differential drive pinion flange nut.
    1. Gradually tighten the flange nut until the pinion shaft endplay is reduced to approximately .020 in. (0.50 mm).
    2.  

  2.  


NOTE
DO NOT OVERTIGHTEN THE PINION FLANGE NUT.

  1. The bearing preload will exceed if the pinion flange nut is overtightened beyond the markings previously mentioned. Then, the differential drive pinion bearing spacer will require replacement. Backing off the pinion flange nut in an effort to compensate for overtightening of the nut will not properly set preload.
  2.  
  3. If reusing the drive pinion flange continue tightening the nut while alternatively turning the pinion gear to seat the bearings until the alignment marks align. Then, further tighten the nut slightly, but not more than five additional degrees.
  4.  
  5. If a new drive pinion flange is installed, the differential must be removed to set the drive pinion bearing preload.
  6.  
  7. Install the rear proper shaft coupling and the propeller shaft.
  8.  
  9. Fill and check the lubricant level.
  10.  
  11. Lower the vehicle.
  12.  

 
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