Montana, Silhouette, Venture 2000-2005

Pinion Seal

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Drain the differential lubricant.
  4.  
  5. Remove or disconnect the following:

    Torque tube assembly.
     
    Drive pinion oil seal from the drive pinion housing and discard
     
    Pinion housing-to-differential bolts
     
    Drive pinion and housing assembly
     
    Drive pinion housing shim from the differential
     
    O-ring seal from the drive pinion housing and discard

    Click image to see an enlarged view

    Fig. Remove the pinion housing-to-differential bolts



    Click image to see an enlarged view

    Fig. Remove the drive pinion and housing assembly (1), and the drive pinion housing shim (2) from the differential (3)



    Click image to see an enlarged view

    Fig. Remove the o-ring seal from the drive pinion housing and discard

     

  6.  

To install:

  1. Lubricate the O-ring seal with synthetic gear oil.
  2.  
  3. Install or connect the following:

    Oil seal to the drive pinion housing, using a seal installation tool
     
    O-ring seal to the drive pinion housing
     
    Drive pinion housing assembly and shim to the differential carrier
     
    Pinion housing-to-differential mounting bolts. Torque the bolts to 21 ft. lbs. (28 Nm).
     

  4.  
  5. Lubricate the sealing surfaces of the drive pinion oil seal with synthetic gear oil.

    Torque tube assembly.
     

  6.  
  7. Fill the differential with synthetic gear oil.
  8.  



Click image to see an enlarged view

Fig. Exploded view of differential assembly, showing pinion components

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Position a jack stand under the rear differential and firmly secure the differential to the jack.
  6.  
  7. Remove the front propeller shaft.
  8.  
  9. Remove the torque tube to bracket through bolt and nut.
  10.  
  11. Remove the torque tube to differential bolts.
  12.  
  13. Pull the torque tube toward the front of the vehicle in order to disengage the torque tube from the differential pinion shaft.
  14.  
  15. Remove the torque tube from the differential.
  16.  
  17. Remove the drive pinion housing oil seal and discard.
    NOTE
    The internal components of the torque tube assembly cannot be serviced separately. If corrosion exists that cannot be polished off, or there is excessive scoring or wear, the torque tube must be replaced as a complete assembly.

  18.  
  19. Inspect the sealing surface of the propeller shaft contained inside the torque tube, polish corrosion off with a crocus cloth.
  20.  

To install:

  1. Lubricate the new pinion housing assembly oil seal with synthetic gear oil.
  2.  
  3. Use the seal installer, J 44915, in order to install a new oil seal to the drive pinion housing.
  4.  
  5. Install the torque tube assembly.
  6.  
  7. Inspect the differential carrier lubricant level.
  8.  
  9. Align the splines on the torque tube shaft to the differential pinion shaft.
  10.  
  11. Install the torque tube to the differential.
  12.  
  13. Install the torque tube to bracket through bolt and tighten the torque tube to bracket through bolt nut to 47 ft. lbs. (64 Nm).
  14.  
  15. Install the torque tube-to-differential carrier bolts and tighten the bolts to 18 ft. lbs. (25 Nm).
  16.  
  17. Install the front propeller shaft.
  18.  
  19. Remove the jack stand from under the rear differential.
  20.  
  21. Lower the vehicle.
  22.  

 
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