Nissan 240SX/Altima 1993-1998 Repair Guide

Extension Housing Seal

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REMOVAL & INSTALLATION



See Figures 1 and 2



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Fig. Fig. 1: Using a jaw type seal puller, remove the oil seal from the extension housing



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Fig. Fig. 2: Using a seal driver or a large socket, drive the new seal into the extension housing

The driveshaft used in these vehicles is a two-piece design with a center bearing. It should only be necessary to remove the front portion of the driveshaft to perform this procedure. However, the center bearing may have to be removed to allow clearance.

  1. Raise and safely support the vehicle.
  2.  
  3. Matchmark the driveshaft and differential companion flanges.
  4.  

If the driveshaft is not installed in the correct position, it may cause a serious vibration.

  1. Remove the center bearing and mounting brackets from the crossmember, as required.
  2.  
  3. Loosen the companion flange bolts and lower the driveshaft from the differential.
  4.  
  5. Carefully withdraw the driveshaft from the transmission. Plug the extension opening to prevent leakage.
  6.  
  7. Using a jaw type seal puller, remove the oil seal from the extension housing.
  8.  

To install:
  1. Wipe all seal contact surfaces clean.
  2.  
  3. Coat the lip of the new seal with clean transmission fluid.
  4.  
  5. Using a seal driver (a large socket can also be used), drive the new seal into the extension housing.
  6.  
  7. Insert the driveshaft into the extension housing, making sure the splines are properly engaged.
  8.  
  9. Raise the driveshaft and align the companion flange marks.
  10.  
  11. Install and EVENLY tighten the flange bolts to 29-11 ft. lbs. (12-22 Nm).
  12.  
  13. Install the center bearing and tighten the bolts to 12-21 ft. lbs. (21-55 Nm).
  14.  
  15. Lower the vehicle.
  16.  

 
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