Grand Cherokee 2006-2007

Pinion Seal

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Removal & Installation



  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Mark the universal joint, companion flange and pinion shaft for installation reference.
  6.  
  7. Remove companion flange bolts and secure the shaft in an upright position to prevent damage to the rear universal joint.
  8.  
  9. Remove the wheel and tire assemblies.
  10.  
  11. Remove brake calipers and rotors to prevent any drag.
  12.  
  13. Rotate companion flange three or four times and verify flange rotates smoothly.
  14.  
  15. Measure rotating torque of the pinion with an inch pound torque wrench and record the reading for installation reference.
  16.  
  17. Install bolts into two of the threaded holes in the companion flange 180° apart.
  18.  
  19. Position Holder C-3281, or equivalent, against the companion flange and install a bolt and washer into one of the remaining threaded holes. Tighten the bolts so the Holder 6719, or equivalent, is held to the flange.
  20.  
  21. Remove the pinion nut and washer.
  22.  
  23. Remove companion flange with Remover C-452, or equivalent.
  24.  
  25. Remove pinion seal with a pry tool or slide hammer mounted screw.
  26.  

To install:


NOTE
The outer perimeter of the seal is pre-coated with a special sealant.

  1. Apply a light coating of gear lubricant on the lip of pinion seal.
  2.  
  3. Install new pinion seal with Installer C-3972A and Handle C-4171, or equivalent.
  4.  
  5. Install companion flange on the end of the shaft with the reference marks aligned.
  6.  
  7. Install bolts into two of the threaded holes in the companion flange 180° apart.
  8.  
  9. Position the holder against the companion flange and install a bolt and washer into one of the remaining threaded holes. Tighten the bolts so the holder is held to the flange.
  10.  
  11. Install companion flange on pinion shaft.
  12.  
  13. Install the pinion washer and a new pinion nut. The convex side of the washer must face outward.
    NOTE
    Do not exceed the minimum tightening torque when installing the companion flange retaining nut at this point. Damage to collapsible spacer or bearings may result.

  14.  
  15. Hold companion flange with and tighten the pinion nut to 210 ft. lbs (285 Nm). Rotate pinion several revolutions to ensure the bearing rollers are seated.
  16.  
  17. Rotate pinion with an inch pound torque wrench. Rotating torque should be equal to the reading recorded during removal plus an additional 5 inch lbs. (0.56 Nm).
    NOTE
    Never loosen pinion nut to decrease pinion bearing rotating torque and never exceed specified preload torque. If rotating torque is exceeded, a new collapsible spacer must be installed.

  18.  
  19. If rotating torque is low tighten pinion nut in 5 ft. lbs. (6.8 Nm) increments until proper rotating
    NOTE
    The bearing rotating torque should be constant during a complete revolution of the pinion. If the rotating torque varies, this indicates a binding condition.

  20.  
  21. Install propeller shaft with the installation reference marks aligned.
  22.  
  23. Install the brake components.
  24.  
  25. Check the differential housing lubricant level.
  26.  
  27. Install wheel and tire assemblies and lower the vehicle.
  28.  

 
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