Nissan Pick-ups and Pathfinder 1970-1988

Front Driveshaft And U-Joints

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

1981-86 720-D Series
PRIMARY DRIVESHAFT
  1. Matchmark the flanges and separate the primary driveshaft from the transfer case.
  2.  
  3. Remove the transfer case.
  4.  
  5. Pull the primary shaft from the transmission and plug the opening.
  6.  

To install:
  1. Slide the front end of the driveshaft into the transmission and support the driveshaft with wire.
  2.  
  3. Install the transfer case.
  4.  
  5. Position the rear end of the driveshaft at the transfer case so the marks made previously align and then tighten the flange bolts to 58-65 ft. lbs. (78-88 Nm).
  6.  

FRONT DRIVESHAFT
  1. Matchmark the flanges and unbolt the front driveshaft at the front differential.
  2.  
  3. Matchmark the flanges and unbolt the front driveshaft at the transfer case.
  4.  

To install:
  1. Align the matchmarks at the transfer case and install the driveshaft. Tighten the flange bolts to 25-33 ft. lbs. (34-44 Nm).
  2.  
  3. Align the matchmarks at the front differential and install the driveshaft. Tighten the flange bolts to 25-33 ft. lbs. (34-44 Nm).
  4.  

1986-88 D21-D Series
  1. Matchmark the flanges and unbolt the front driveshaft at the front differential.
  2.  
  3. Matchmark the flanges and unbolt the front driveshaft at the transfer case.
  4.  

To install:
  1. Align the matchmarks at the transfer case and install the driveshaft. Tighten the flange bolts to 29-33 ft. lbs. (39-44 Nm).
  2.  
  3. Align the matchmarks at the front differential and install the driveshaft. Tighten the flange bolts to 29-33 ft. lbs. (39-44 Nm).
  4.  



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Fig. Fig. 1: Front driveshaft (primary)-1981-86 4wd models (720-D series)



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Fig. Fig. 2: Front driveshaft (front)-1981-86 4wd models (720-D series)



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Fig. Fig. 3: Front driveshaft-1986-88 4wd models (D21-D series)



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Fig. Fig. 4: Removing the front driveshaft-most models similar

U-JOINT OVERHAUL



  1. Matchmark the yoke and the driveshaft.
  2.  
  3. Remove the snaprings from the bearings.
  4.  
  5. Position the yoke on vise jaws. Using a bearing remover and a hammer, gently tap the remover until the bearing is driven out of the yoke about 1 in. (25mm).
  6.  
  7. Place the tool in the vise and drive the yoke away from the tool until the bearing is removed.
  8.  
  9. Repeat Steps 3 and 4 for the other bearings.
  10.  
  11. Check for worn or damaged parts. Inspect the bearing journal surfaces for wear.
  12.  

To assemble:
  1. Install the bearing cups, seals, and O-rings in the spider.
  2.  
  3. Grease the spider and the bearings.
  4.  
  5. Position the spider in the yoke.
  6.  
  7. Start the bearings in the yoke and then press them into place, using a vise.
  8.  
  9. If the axial play of the spider is greater than 0.0007 in. (0.02mm), select snaprings which will provide the correct play. Be sure that the snaprings are the same size on both sides or driveshaft noise and vibration will result.
  10.  

 
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