GM Camaro 1982-1992 Repair Guide

Pinion Seal

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REMOVAL & INSTALLATION



Except Borg-Warner Rear Axle

See Figures 1, 2 and 3

  1. Raise and safely support the vehicle.
  2.  
  3. Remove both rear wheel and tire assemblies.
  4.  
  5. Matchmark the driveshaft and pinion yoke so they may be reassembled in the same position. Remove the driveshaft.
  6.  
  7. Using a suitable punch, mark the position of the pinion yoke, pinion shaft and nut so proper reinstallation preload can be maintained.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Pinion nut removal



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Fig. Fig. 2: Flange removal

  1. Using a suitable tool, hold the pinion flange in place, then remove the pinion flange nut and washer.
  2.  
  3. Place a container under the differential to catch any fluid that may drain from the rear axle. Using a suitable tool, remove the pinion yoke.
  4.  
  5. Use a suitable tool to remove the pinion seal.
  6.  

To install:
  1. Inspect the sealing surfaces of the pinion yoke for nicks or damage and replace, as necessary. Examine the carrier bore and remove any burrs that may cause leaks around the outside of the seal.
  2.  



Click image to see an enlarged view

Fig. Fig. 3: Seal installation

  1. Install the seal using a suitable installer.
  2.  
  3. Apply a seal lubricant to the outer diameter of the pinion flange and the sealing lip of the new seal.
  4.  
  5. Install the pinion yoke on the drive pinion by taping with a soft-face hammer until a few pinion threads project through the pinion yoke.
  6.  
  7. Install the washer and pinion flange nut. While holding the pinion yoke, tighten the nut to the same position as marked earlier, then tighten an additional 1 / 16 in. (1.6mm) turn beyond the marks.
  8.  
  9. Install the driveshaft.
  10.  
  11. Install the rear wheels and tires. Check and add the correct lubricant, as necessary.
  12.  

Borg-Warner Rear Axle
  1. Raise and safely support the vehicle.
  2.  
  3. Remove both rear wheel and tire assemblies.
  4.  
  5. Matchmark the driveshaft and pinion yoke so they may be reassembled in the same position. Remove the driveshaft.
  6.  
  7. Using a beam-type inch pound torque wrench on the pinion yoke nut, measure and record the amount of pinion bearing, axle bearings and seal preload. Turn the torque wrench smoothly for several rotations and record the amount of preload as the assembly is turning, not the initial force required to start the assembly moving.
  8.  

Preload is measured as the amount of torque required to turn the assembly.

  1. Using a suitable tool to hold the pinion yoke in place, remove the pinion yoke nut and washer.
  2.  
  3. Place a suitable container under the differential to catch any fluid that may drain from the rear axle. Using a suitable tool, remove the pinion flange.
  4.  
  5. Use a suitable tool to remove the pinion seal.
  6.  

To install:
  1. Inspect the seal surface of the pinion flange for tool marks, nicks or damage and replace, as necessary. Examine the carrier bore and remove any burrs that might cause leaks around the outside of the seal.
  2.  
  3. Install the seal 0.010 in. (0.25mm) below the flange surface using a suitable seal installer.
  4.  
  5. Apply suitable seal lubricant to the outer diameter of the pinion flange and the sealing lip of the new seal.
  6.  
  7. Install the pinion flange on the drive pinion by taping with a soft hammer until a few pinion threads project through the pinion flange.
  8.  
  9. Install the washer and pinion flange nut. While holding the pinion flange, tighten the nut a little at a time and turn the drive pinion several revolutions after each tightening, to set the bearing rollers. Check the preload each time with a suitable inch pound torque wrench until the preload is 5 inch lbs. (0.6 Nm) more then the reading obtained during disassembly.
  10.  
  11. Install the driveshaft.
  12.  
  13. Install the rear wheels and tires. Check and add the correct lubricant, as necessary.
  14.  

 
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