Toyota 4Runner 2001-06

Pinion Seal

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the differential oil.
  4.  
  5. Remove or disconnect the following:

    Front driveshaft by matchmarking it
     
    Companion flange nut, by loosen the staked portion
     
    Companion flange, using a screw-type extractor
     
    Oil seal, using an extractor
     

  6.  

To install:

  1. Install a new oil seal, to a depth of 0.059 in. (1.5mm) below the lip, using a seal driver.
  2.  
  3. Lubricate the seal lip with multi-purpose grease.
  4.  
  5. Install or connect the following:

    Companion flange, coat the threads with multi-purpose grease
     
    New companion flange nut. Tighten it to 89 ft. lbs. (120 Nm).
     

  6.  
  7. Measure the bearing preload, using a torque wrench. The correct preload should be 5-9 inch lbs. (0.6-1.0 Nm) for a used bearing or 10-17 inch lbs. (1-2 Nm) for a new bearing.
  8.  


NOTE
If the preload is greater that specified, replace the bearing spacer. If the preload is less than specified, tighten the companion flange nut in 9 ft. lbs. (13 Nm) increments until the correct preload is achieved. Maximum torque for the nut is 165 ft. lbs. (223 Nm). If the value is exceeded, the bearing spacer must be replaced; do not back off the flange nut to lower the torque or preload.

  1. Install the front driveshaft by aligning the matchmarks.
  2.  
  3. Check the companion flange run-out; maximum allowable run-out is 0.003 in. (0.10mm).
  4.  
  5. Stake the pinion flange nut.
  6.  
  7. Refill the differential with oil.
  8.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Drain the differential oil.
  4.  
  5. Remove or disconnect the following:

    Front driveshaft by matchmarking it
     
    Companion flange nut, by loosen the staked portion
     
    Companion flange, using a screw-type extractor
     
    Oil seal, using an extractor
     

  6.  

To install:

  1. Install a new oil seal, to a depth of 0.171 in. (4.35mm) below the lip, using a seal driver.
  2.  
  3. Lubricate the seal lip with multi-purpose grease.
  4.  
  5. Install or connect the following:

    Companion flange, coat the threads with multi-purpose grease
     
    New companion flange nut. Tighten it to 89 ft. lbs. (120 Nm).
     

  6.  
  7. Measure the bearing preload, using a torque wrench. The correct preload should be 8.7-13.9 inch lbs. (0.98-1.57 Nm) for a new bearing or 4.3-6.9 inch lbs. (0.49-0.78 Nm) for a used bearing.
  8.  


NOTE
If the preload is greater that specified, replace the bearing spacer. If the preload is less than specified, tighten the companion flange nut in 9 ft. lbs. (13 Nm) increments until the correct preload is achieved. Maximum torque for the nut is 268 ft. lbs. (370 Nm). If the value is exceeded, the bearing spacer must be replaced; do not back off the flange nut to lower the torque or preload.

  1. Install the front driveshaft by aligning the matchmarks.
  2.  
  3. Check the companion flange run-out; maximum allowable run-out is 0.003 in. (0.10mm).
  4.  
  5. Stake the pinion flange nut.
  6.  
  7. Refill the differential with oil.
  8.  

  1. Raise and safely support the vehicle.
  2.  
  3. Drain the differential oil.

    Click image to see an enlarged view

    Fig. Exploded view of the front differential pinion seal components

  4.  
  5. Make matchmarks and remove the driveshaft.

    Click image to see an enlarged view

    Fig. Place matchmarks on the flanges, then loosen and remove the bolts

  6.  
  7. Loosen the staked part of the companion flange nut. Use a counter-hold tool on the flange and remove the nut.

    Click image to see an enlarged view

    Fig. Using a chisel and hammer, loosen the staked part of the nut. Hold the flange with SST 09950-30010, or equivalent, and remove the nut

  8.  
  9. Use a screw-type extractor to remove the companion flange.

    Click image to see an enlarged view

    Fig. This is a screw-type extractor from Toyota-Tool 09950-30010

  10.  
  11. Use an extractor to remove the oil seal and oil slinger.

    Click image to see an enlarged view

    Fig. The extractor fits into Seal Removal Tool 09308-10010 as shown

  12.  
  13. Remove the bearing spacer, bearing and oil slinger.
  14.  

To install:

  1. Install the new bearing spacer, rear bearing and oil slinger.
  2.  
  3. Install the new oil seal. Use the correct size driver to install the seal. Drive it in to a depth of 0.059 in. (1.5mm) below the lip.
  4.  
  5. Apply a coat of multi-purpose grease to the inner lip of the seal. Install the companion flange.
  6.  
  7. Coat the threads of a NEW nut with multi-purpose grease. Counter-hold the flange and tighten the nut to 89 ft. lbs. (120 Nm).
  8.  
  9. Use a torque wrench to measure the pinion bearing preload. Correct preload on a used bearing is 5-9 inch lbs. (0.6-1.0 Nm) and on a new bearing is 10-17 inch lbs. (1-2 Nm).
    NOTE
    If preload is greater than specified, replace the bearing spacer. If preload is less than specified, tighten the companion flange nut in 9 ft. lbs. (13 Nm) increments until the correct preload is achieved. Maximum torque for the nut is 165 ft. lbs. (223 Nm). If this value is exceeded, the bearing spacer must be replaced; Do NOT back off the flange nut to lower the torque or preload.

  10.  
  11. Check the run-out at the companion flange; maximum allowable run-out is 0.003 in. (0.10mm).
  12.  
  13. Stake the pinion flange nut.
  14.  
  15. Fill the differential with the correct amount of fluid.
  16.  
  17. Install the front driveshaft.
  18.  
  19. Lower the vehicle to the ground.
  20.  

 
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