Questions and Answers
Jeep Grand Cherokee CV Joint Replacement
Q. I need help on how to change out a CV joint on this vehicle.
- 1994 Jeep Grand Cherokee
- 4.0 liter 6 cylinder
- Automatic transmission
- 145,000 miles
A. Here you go!
HANDLING AND CLEANING PRECAUTIONS
Extreme care must be exercised to avoid puncturing or tearing the boots. Also avoid damage to the ABS tone ring pressed onto the CV joint.
The rubber material in shaft boots is not compatible with oil, gasoline, or petroleum based cleaning solvents. Do not expose the rubber boots to any of these fluids. Use only soap and water to clean the rubber boots. After cleaning, the rubber boot must be thoroughly rinsed and dried.
The most common failure of CV-joints is torn or ripped boots and subsequent lubricant loss or contamination. Look for lubricant around the exterior of boot. Check for a punctured or torn boot or retaining clamp loose. If joint was operating satisfactorily and grease does not appear contaminated, replace boot. When a CV drive shaft is removed from the vehicle for service, the boot should be properly cleaned. Inspect the boot for cracks, tears and scuffed areas on the surfaces. If any of these conditions exist boot replacement is recommended.
If joint is noisy or worn, bypass following disassembly and replace entire unit and boot.DISASSEMBLY:
- Remove retaining clamps from the outer CV joint and discard. Slide the boot off the outer joint and down the shaft.
- Remove the lubricant to expose the joint components.
- Clamp the shaft in a vise (with soft jaws). Give a sharp tap to the top of the housing to dislodge joint from internal circlip Slide the joint from the shaft.
- Remove the surplus lubricant. Apply installation alignment marks on the bearing hub, bearing cage and housing with dabs of paint.
- Place the stub shaft in a soft-jawed vise to avoid damage to the shaft splines.
- Press down on one side of the bearing cage/hub to tilt the cage. This will provide access to a ball at the opposite side of the cage. If the CV joint is tight, use a hammer and brass drift to loosen the bearing hub. Do not hit the bearing cage with the drift.
- Remove the ball from the bearing cage. If necessary, a small pry bar can be used to pry the ball loose from the cage.
- Repeat the step above until all six balls are removed from the bearing cage.
- Tilt the bearing cage and hub to a vertical position to remove.
- Insert one of the bearing hub lands into the adjacent cage window and roll it out of the cage.
Polished contact surface areas on raceways and bearing cage spheres are normal. If joint was noisy or vibrated it should be replaced.
- Inspect the lubricant for grit, dirt, water damage and metallic particles.
- Clean all the components with an appropriate solvent and dry them with compressed air.
- Inspect the ball raceways in the housing for excessive wear or scoring.
- Examine the stub shaft splines and threads for damage.
- Inspect the balls for pitting, cracks, scoring and excessive wear. A dull exterior surface is normal.
- Inspect the bearing cage for wear, grooves, ripples, cracks and chipping.
- Inspect the bearing hub for excessive wear and scoring on ball raceways.
- Lightly apply lubricating oil to all joint components before assembling them.
- Align the bearing hub, cage and housing according to the alignment reference marks.
- Insert one of the bearing hub lands into a bearing cage window and roll it into the cage. Rotate the bearing hub 90° to complete the installation.
- Insert bearing cage/hub into the housing. Rotate the cage/hub 90° to complete the installation. Ensure the tapered edge is facing outward.
- Apply the lubricant included with the replacement rubber boot to the ball raceways. Spread the lubricant equally between all the raceways. One packet of lubricant is sufficient to lubricate the joint.
- Tilt the bearing hub and cage and install the balls in the raceways.
- Install the rubber boot on the axle shaft. Ensure the clamp sealing area is in the grooved section of the axle shaft. Install a new clamp.
- Engage the splines and install the joint onto the shaft. Tap sharply with mallet until seated.
- Ensure that the snap ring is properly seated in the housing. Pull the outer CV joint from the shaft to test, it should not come off.
- Install remaining amount of lubricant to cage and balls.
- Place the large diameter end of the rubber boot over the edge of the housing. Ensure that the boot is not twisted.
- Ensure the clamp sealing area is in the grooved section of the housing. Install a new clamp.
- Install the axle shaft.