Miata 1990-1997

CV-Joint Boots

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Removal & Installation



Three types of CV-joints are used. The inboard CV-joints are either double offset type or the tripot type; disassembly procedures differ accordingly. All outboard CV-joints are the Birfield type. The Birfield type CV-joint cannot be disassembled; if an outboard CV-joint boot needs replacement, the inboard CV-joint must be removed.

Double Offset CV-Joint

Specific to:

Mazda Miata 1990-1997



Click image to see an enlarged view

Fig. CV-joint boot removal, double offset

  1. Remove the halfshaft from the vehicle and clamp it in a vise equipped with jaw caps, to prevent damage to the machined surfaces. Do not allow the vise to contact the boot or its clamps.
  2.  
  3. Remove the large boot clamp from the inboard CV-joint, using side cutters. After removing the clamp, roll the boot back over the shaft.
    NOTE
    Check the grease for contamination by rubbing it between 2 fingers. Any gritty feeling indicates a contaminated CV-joint, in which case the entire CV-joint must be disassembled, cleaned and inspected. If the grease is not contaminated and the CV-joint has been operating satisfactorily, continue with the boot replacement procedure and add the required lubricant.

  4.  
  5. Paint alignment marks on the outer race and shaft for assembly reference. Remove the wire ring bearing retainer and remove the outer race.
  6.  
  7. Paint alignment marks on the inner race and shaft for assembly reference. Remove the inner race snapring from the end of the halfshaft and remove the inner race, cage and ball bearings from the shaft as an assembly.
    NOTE
    Use care to prevent damage to the bearing surfaces and cage.

  8.  
  9. If only the boot is being replaced, go to the next step. If it is necessary to disassemble the CV-joint further, proceed as follows:
    1. Pry the ball bearing out of the bearing cage using a small prybar with blunted edges. Mark the inner race and the bearing cage for proper assembly.
    2.  
    3. Rotate the inner race to align the bearing lands with the windows in the bearing cage. Remove the inner race through the larger end of the cage.
    4.  

  10.  
  11. Remove the small clamp and remove the inner boot from the halfshaft. If the boot is to be reused, wrap the shaft splines with tape before removing.
  12.  
  13. If the outer CV-joint boot is to be replaced, remove the clamps and slide the boot off the shaft from the inboard side.
  14.  

To install:



Click image to see an enlarged view

Fig. CV-joint boot installation, double offset

  1. If the outboard boot was removed, slide the boot onto the shaft from the inboard side. Wrap tape on the splines before installing to protect the boot.
  2.  
  3. Install the inboard boot and remove the tape from the shaft.
  4.  
  5. Lubricate the inner race, bearing cage and ball bearings with high temperature CV-joint grease.
  6.  
  7. Position the inner race in the bearing cage and align the matchmarks.
    NOTE
    Install the race with the chamfered splines facing the large end of the cage.

  8.  
  9. Install the ball bearings in the bearing cage. The balls can be pressed into the cage windows with the heel of the hand.
  10.  
  11. Install the inner race, cage and balls on the halfshaft as an assembly. Make sure the chamfer on the bearing cage faces the snapring and the paint marks made during removal line up. Install the inner race snapring.
  12.  
  13. Lubricate the outer race with high temperature CV-joint grease. Install the outer race and add more grease to the outer race. Install the wire ring bearing retainer.
  14.  
  15. Position the CV-joint boot(s). Make sure the boot is fully seated in the grooves in the shaft and outer race.
  16.  
  17. Insert a small prybar with rounded edges between the boot and the outer bearing race to allow trapped air to escape from the boot. Install new boot clamps.
  18.  
  19. Wrap the clamps around the boots in a clockwise direction, pull tight with pliers and bend the locking tabs to secure in position.
  20.  
  21. Work the CV-joint through its full range of travel at various angles. The joint should flex, extend and compress smoothly.
  22.  
  23. Install the halfshaft into the vehicle.
  24.  

Tripod CV-Joint

Specific to:

Mazda Miata 1990-1997



Click image to see an enlarged view

Fig. CV-joint, tripod



Click image to see an enlarged view

Fig. CV-joint boot installation, tripod

  1. Remove the halfshaft from the vehicle and clamp it in a vise equipped with jaw caps, to prevent damage to the machined surfaces. Do not allow the vise to contact the boot or its clamps.
  2.  
  3. Remove the large boot clamp from the inboard CV-joint, using side cutters. After removing the clamp, roll the boot back over the shaft.
    NOTE
    Check the grease for contamination by rubbing it between 2 fingers. Any gritty feeling indicates a contaminated CV-joint, in which case the entire CV-joint must be disassembled, cleaned and inspected. If the grease is not contaminated and the CV-joint has been operating satisfactorily, continue with the boot replacement procedure and add the required lubricant.

  4.  
  5. Paint alignment marks on the outer race and shaft for assembly reference. Remove the wire ring bearing retainer and remove the outer race.
  6.  
  7. Paint alignment marks on the tripot bearing and shaft for assembly reference. Remove the tripot bearing snapring and, using a brass drift and hammer, remove the tripot bearing from the shaft.
  8.  
  9. Remove the small clamp and remove the inner boot from the halfshaft. If the boot is to be reused, wrap the shaft splines with tape before removing.
  10.  
  11. If the outer CV-joint boot is to be replaced, remove the clamps and slide the boot off the shaft from the inboard side.
  12.  

To install:

  1. If the outboard boot was removed, slide the boot onto the shaft from the inboard side. Wrap tape on the splines before installing to protect the boot.
  2.  
  3. Install the inboard boot and remove the tape from the shaft.
  4.  
  5. Install the tripot assembly on the halfshaft. Tap the assembly onto the shaft using a hammer and brass drift. Install the tripot assembly retaining ring.
  6.  
  7. Fill the CV-joint outer race with high temperature CV-joint grease. Install the outer race over the tripot joint and install the wire ring bearing retainer.
  8.  
  9. Position the CV-joint boot(s). Make sure the boot is fully seated in the grooves in the shaft and outer race.
  10.  
  11. Insert a small prybar with rounded edges between the boot and the outer bearing race to allow trapped air to escape from the boot. Install new boot clamps.
  12.  
  13. Wrap the clamps around the boots in a clockwise direction, pull tight with pliers and bend the locking tabs to secure in position.
  14.  
  15. Work the CV-joint through its full range of travel at various angles. The joint should flex, extend and compress smoothly.
  16.  
  17. Install the halfshaft into the vehicle.
  18.  

 
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