Jeep Wrangler/YJ 1987-1995 Repair Guide

Rear Driveshaft and U-Joints

Print

See Figures 1, 2, 3, 4 and 5

REMOVAL & INSTALLATION





Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the front and rear driveshafts



Click image to see an enlarged view

Fig. Fig. 2: Removing the U-bolts from the retaining strap at the rear axle yoke



Click image to see an enlarged view

Fig. Fig. 3: Removing the U-bolt strap at the rear axle yoke



Click image to see an enlarged view

Fig. Fig. 4: After removing the U-bolt strap bolts, disconnect the driveshaft from the rear axle yoke



Click image to see an enlarged view

Fig. Fig. 5: Removing the rear driveshaft from the transfer case

  1. Shift the transmission and transfer case to their neutral positions.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Scribe alignment marks at the drive pinion gear shaft and at the rear of the driveshaft for installation reference.
  6.  
  7. Remove the U-bolt strap bolts at the drive pinion gear shaft (axle) yoke.
  8.  
  9. Disconnect the driveshaft at the transfer case output shaft and remove the driveshaft.
  10.  

To install:
  1. Slide the slip yoke on the transfer case output shaft and align the installation reference marks at the drive pinion gear shaft yoke and install the driveshaft.
  2.  
  3. With the driveshaft in the correct position, use new U-jount straps and bolts and tighten the bolts to 14 ft. lbs. (19 Nm).
  4.  
  5. Lower the vehicle.
  6.  

U-JOINT REPLACEMENT



See Figures 6, 7, 8, 9 and 10

All Wranglers use a single cardan universal joints. These U-joints are not serviceable and must be replaced as a unit if found to be defective.

  1. Remove the driveshaft as outlined earlier.
  2.  
  3. Clamp the yoke, not the tube, in a vise.
  4.  
  5. Saturate the bearing caps with penetrating oil prior to removal and remove the bearing cap retainer clips.
  6.  
  7. Support the yoke on the vise jaws.
  8.  
  9. Locate a socket that is larger in diameter than the bearing cap. Place the socket against the yoke and around the perimeter of the first bearing cap to be removed. This will be the bearing cap receiver. Locate a socket that is smaller in diameter than the bearing cap. Place the socket against the opposite bearing cap. This will be the bearing cap driver. Position the yoke with the sockets in a vise.
  10.  
  11. Compress the vise jaws to force the bearing cap into the larger socket.
  12.  
  13. Release the vise jaws. Remove the sockets and bearing cap that was partially forced out of the yoke.
  14.  
  15. Place the larger socket around the perimeter of the remaining bearing cap. Place the smaller socket against the spider. Position the yoke with the sockets in a vise.
  16.  
  17. Compress the vise jaws to force the remaining bearing cap out of the yoke.
  18.  
  19. Remove the yoke and sockets from the vise.
  20.  
  21. Remove the remaining bearing cap, bearings, seals and spider from the driveshaft yoke.
  22.  

To install:
  1. Apply extreme pressure (EP), lithium-base lubricant to aid in installation.
  2.  
  3. Position the spider in the yoke. Insert the seals and bearings. Tap the bearing caps into the yoke bores far enough to hold the spider in position.
  4.  



Click image to see an enlarged view

Fig. Fig. 6: Bearing cap retaining clips



Click image to see an enlarged view

Fig. Fig. 7: Bearing cap removal



Click image to see an enlarged view

Fig. Fig. 8: Exploded view of the single cardan U-joint



Click image to see an enlarged view

Fig. Fig. 9: Snap ring removal



Click image to see an enlarged view

Fig. Fig. 10: Bearing cap installation


WARNING
Do not clamp the driveshaft tube in a vise. Clamp only the forged portion of each yoke in the vise, being careful not to over tighten and possibly distorting the yoke.

  1. Locate a socket that is smaller in diameter than the yoke bore. Place the socket against one bearing cap. Position the yoke with the socket in a vise.
  2.  
  3. Compress the vise jaws to force the bearing caps into the yoke with the socket. Force the caps into the yoke bores far enough to install the retaining clips.
  4.  
  5. After the bearing caps are completely seated install the retaining clips.
  6.  
  7. Reinstall the driveshaft as previously outlined.
  8.  

 
label.common.footer.alt.autozoneLogo