Chrysler Full-Size Vans 1989-1998 Repair Guide

Pinion Seal

Print

REMOVAL & INSTALLATION



See Figures 1, 2 and 3



Click image to see an enlarged view

Fig. Fig. 1: Always measure bearing preload prior to loosening the pinion nut



Click image to see an enlarged view

Fig. Fig. 2: Install the pinion seal using a suitable driver



Click image to see an enlarged view

Fig. Fig. 3: Hold the pinion yoke with a suitable tool and tighten the shaft nut, then recheck the pinion preload

  1. Raise and safely support the vehicle securely on jackstands.
  2.  
  3. Scribe a mark on the universal joint, pinion yoke, and pinion shaft for installation reference.
  4.  
  5. Disconnect the propeller shaft from the pinion yoke.
  6.  
  7. Secure the propeller shaft in an upright position to prevent damage to the rear universal joint.
  8.  
  9. Remove the wheel and tire assemblies.
  10.  
  11. Remove the brake drums to prevent any drag. The drag may cause a false bearing rotating torque measurement.
  12.  
  13. Rotate the pinion yoke three or four times.
  14.  
  15. Measure the amount of torque necessary to rotate the pinion gear with a inch pound dial-type torque wrench. Record the torque reading for installation reference.
  16.  
  17. Hold the yoke in position with a pipe wrench or other suitable tool. Remove the pinion shaft nut and washer.
  18.  
  19. Remove the yoke.
  20.  
  21. Remove the pinion shaft seal with suitable prytool or slide-hammer mounted screw.
  22.  

To install:
  1. Clean the seal contact surface in the housing bore.
  2.  
  3. Examine the splines on the pinion shaft for burrs or wear. Remove any burrs and clean the shaft.
  4.  
  5. Inspect pinion yoke for cracks, worn splines and worn seal contact surface. Replace yoke if necessary.
  6.  

The outer perimeter of the seal is pre-coated with a special sealant. An additional application of sealant is not required.

  1. Apply a light coating of gear lubricant on the lip of pinion seal.
  2.  
  3. Install the new pinion shaft seal.
  4.  

The seal is correctly installed when the seal flange contacts the face of the differential housing flange.

  1. Position the pinion yoke on the end of the shaft with the reference marks aligned.
  2.  
  3. Seat the yoke on the pinion shaft.
  4.  
  5. Remove the tools and install the pinion yoke washer. The convex side of the washer must face outward.
  6.  


WARNING
Do not exceed the minimum tightening torque when installing the pinion yoke retaining nut at this point. Damage to the collapsible spacer or bearings may result.

  1. Hold the pinion yoke with pipe wrench or other suitable tool and tighten shaft nut to 210 ft. lbs. (285 Nm).
  2.  
  3. Rotate the pinion shaft several revolutions to ensure the bearing rollers are seated.
  4.  
  5. Rotate the pinion shaft using an inch pounds beam type torque wrench. Rotating torque should be equal to the reading recorded during removal, plus an additional 5 inch lbs. (0.56 Nm).
  6.  


WARNING
Never loosen the pinion gear nut to decrease pinion gear bearing rotating torque, and never exceed the specified preload torque. If preload torque is exceeded, a new collapsible spacer must be installed.

  1. Install the brake drums.
  2.  
  3. Install the wheel and tire assemblies.
  4.  
  5. Align the propeller shaft with the pinion yoke and install.
  6.  
  7. Lower the vehicle.
  8.  

 
label.common.footer.alt.autozoneLogo