Commander 2006-2007

Pinion Seal

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Removal & Installation



  1. With the vehicle in neutral, raise and safely support the vehicle.
  2.  
  3. Mark a reference line across the axle flange and driveshaft flange.
  4.  
  5. Remove the driveshaft
  6.  
  7. Remove the brake calipers and rotors to prevent any drag.
  8.  
  9. Rotate the pinion flange three or four times and verify flange rotates smoothly.
  10.  
  11. Measure the torque needed to rotate the pinion flange with an inch pound torque wrench. Record the reading for installation reference.
  12.  
  13. Hold the pinion flange with Wrench C-3281 and remove pinion nut and washer.
  14.  
  15. Remove the flange with two jaw puller.
  16.  
  17. Remove the pinion seal with a seal pick or slide-hammer mounted screw.
  18.  

To install:

  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.
  4.  
  5. Install flange on the end of the shaft with the reference marks aligned.
  6.  
  7. Install flange on pinion shaft with Installer C-3718 and Wrench C-3281.

    Click image to see an enlarged view

    Fig. Install a new pinion seal with Special Tool C-3972A (1) and Handle C-4171 (2)-Rear Pinion

  8.  
  9. Install pinion washer and a new pinion nut. The convex side of the washer must face outward.
    WARNING
    Do not exceed the minimum tightening torque when installing the companion flange retaining nut at this point. Failure to follow these instructions can damage the collapsible spacer or bearings.

  10.  
  11. Hold flange with Wrench C-3281 and tighten pinion nut to 210 ft. lbs. (285 Nm). Rotate pinion several revolutions to ensure bearing rollers are seated.
  12.  
  13. Rotate the pinion flange 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).
    WARNING
    Never loosen the 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. Failure to follow these instructions can damage the collapsible spacer or bearings.

  14.  
  15. If the rotating torque is low use Wrench C-3281 to hold the flange and tighten the pinion nut in 60 inch lbs. (6.8 Nm) increments until the proper rotating torque is achieved.
    NOTE
    The seal replacement is unacceptable if final pinion nut torque is less than 210 ft. lbs. (285 Nm).


    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.

  16.  
  17. Install the driveshaft.
  18.  
  19. Install the rear brake components.
  20.  
  21. Lower the vehicle.
  22.  

 
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