Nissan Pick-ups and Pathfinder 1989-1995

Rear Driveshaft and U-Joints

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REMOVAL & INSTALLATION



See Figures 1 through 5

2wd Models
TWO-PIECE DRIVESHAFT WITH CENTER BEARING
  1. Raise the rear of the truck and support the rear axle housing on jackstands.
  2.  
  3. Before you begin to disassemble the driveshaft components, you must first paint accurate alignment marks on the mating flangers. Do this on the rear universal joint flange, the center flange, and on the transmission flange.
  4.  
  5. Remove the bolts attaching the rear universal joint flange to the drive pinion flange.
  6.  
  7. Drop the rear section of the shaft slightly and pull the unit out of the center bearing sleeve yoke.
  8.  
  9. Remove the center bearing support from the crossmember.
  10.  
  11. Separate the transmission output flange and remove the front half of the driveshaft together with the center bearing assembly.
  12.  



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Fig. Fig. 1: Exploded view of the rear driveshaft-4wd models



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Fig. Fig. 2: Exploded view of the rear driveshaft-2wd and 4wd models (VG30E engine)



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Fig. Fig. 3: Exploded view of the rear driveshaft-2wd models (KA24E engine)



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Fig. Fig. 4: Disconnect the driveshaft at the differential flange



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Fig. Fig. 5: Paint matchmarks on the flanges

To install:
  1. Connect the output flange of the transmission to the flange on the front half of the shaft.
  2.  
  3. Install the center bearing support to the crossmember, but do not fully tighten the bolts.
  4.  
  5. Install the rear section of the shaft making sure that all mating marks are aligned.
  6.  
  7. Tighten all flange bolts to 29-33 ft. lbs. (39-44 Nm) on Z24i and KA24E engines; or 58-65 ft. lbs. (78-88 Nm) on VG30i and VG30E engines.
  8.  
  9. Tighten the center bearing support bolts to 12-16 ft. lbs. (16-22 Nm).
  10.  

4wd Models
ONE-PIECE DRIVESHAFT
  1. Raise the rear of the truck and support the rear axle housing with jackstands.
  2.  
  3. Paint a mating mark on the two halves of the rear universal joint flange.
  4.  
  5. Remove the bolts which hold the rear flange together.
  6.  
  7. Remove the splined end of the driveshaft from the transmission extension housing. To prevent losing a lot of gear oil, plug the end of the transmission with a rag.
  8.  
  9. Remove the driveshaft from under the truck.
  10.  

To install:
  1. Apply multipurpose grease to the splined end of the shaft.
  2.  
  3. Insert the driveshaft sleeve into the transmission.
  4.  

Be careful not to damage the extension housing grease seal.

  1. Align the mating marks on the rear flange and replace the bolts. Tighten to 58-65 ft. lbs. (78-88 Nm).
  2.  
  3. Remove the jackstands and lower the vehicle.
  4.  

TWO-PIECE DRIVESHAFT WITH CENTER BEARING
  1. Raise the rear of the truck and support the rear axle housing on jackstands.
  2.  
  3. Before you begin to disassemble the driveshaft components, you must first paint accurate alignment marks on the mating flangers. Do this on the rear universal joint flange, the center flange, and on the transmission flange.
  4.  
  5. Remove the bolts attaching the rear universal joint flange to the drive pinion flange.
  6.  
  7. Drop the rear section of the shaft slightly and pull the unit out of the center bearing sleeve yoke.
  8.  
  9. Remove the center bearing support from the crossmember.
  10.  
  11. Separate the transmission output flange and remove the front half of the driveshaft together with the center bearing assembly.
  12.  

To install:
  1. Connect the output flange of the transmission to the flange on the front half of the shaft.
  2.  
  3. Install the center bearing support to the crossmember, but do not fully tighten the bolts.
  4.  
  5. Install the rear section of the shaft making sure that all mating marks are aligned.
  6.  
  7. Tighten all flange bolts to 29-33 ft. lbs. (39-44 Nm) on Z24i and KA24E engines; or 58-65 ft. lbs. (78-88 Nm) on VG30i and VG30E engines.
  8.  
  9. Tighten the center bearing support bolts to 12-16 ft. lbs. (16-22 Nm).
  10.  

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 inch (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, 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.  

END OF SECTION



 
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