Chrysler Full-Size Trucks 1989-1996 Repair Guide

Pinion Seal

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REMOVAL & INSTALLATION



Model 60 and 70 Axle

See Figures 1 and 2

A torque wrench capable of at least 300 ft. lbs. (408 Nm) is required for pinion seal installation.

  1. Raise and support the truck on jackstands.
  2.  
  3. Allow the axle to hang freely.
  4.  
  5. Matchmark and disconnect the driveshaft from the front axle.
  6.  
  7. Using a holding tool, hold the pinion flange while removing the pinion nut.
  8.  
  9. Using a puller, remove the pinion flange.
  10.  
  11. Use a puller to remove the seal, or punch the seal out using a pin punch.
  12.  

To install:


Click image to see an enlarged view

Fig. Fig. 1: Install the pinion seal using the specialtool shown, or equivalent-Model 60/70 axle

  1. Thoroughly clean the seal bore and make sure that it is not damaged in any way. Coat the sealing edge of the new seal with a small amount of 80W/90 oil and drive the seal into the housing using a seal driver.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Install the pinion and yoke using the special tools shown, or equivalent-Model 60/70 axle

  1. Coat the inside of the pinion flange with clean 80W/90 oil and install the flange onto the pinion shaft.
  2.  
  3. Install the nut on the pinion shaft and tighten it to 250-300 ft. lbs. (340-408 Nm).
  4.  
  5. Connect the driveshaft.
  6.  

Model 44 Axle

A torque wrench capable of at least 225 ft. lbs. (305 Nm) is required for pinion seal installation.

  1. Raise and safely support the vehicle with jackstands under the frame rails. Allow the axle to drop to rebound position for working clearance.
  2.  
  3. Mark the companion flange and U-joints for correct reinstallation position.
  4.  
  5. Remove the driveshaft. Use a suitable tool to hold the companion flange. Remove the pinion nut and companion flange.
  6.  
  7. Install a new pinion seal after lubricating the sealing surfaces. Use a suitable seal driver. Install the companion flange and pinion nut. Tighten the nut to 200-220 ft. lbs. (272-299 Nm).
  8.  

 
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