Introduction to CV Axle Maintenance#

Constant Velocity (CV) axles are critical components of a vehicle's drivetrain, transmitting power from the transmission to the wheels. Each axle contains CV joints, which are packed with specialized grease and protected by rubber or thermoplastic boots. Over time, these boots can tear, allowing contaminants like dirt and water to enter the joint and causing the grease to escape. This contamination leads to accelerated wear, eventually resulting in clicking, popping, or grinding noises, and ultimately, joint failure.

Regular inspection and timely regreasing can significantly extend the life of a CV axle, especially when a boot tear is caught early. This procedure details the steps for disassembling, cleaning, inspecting, and regreasing a Honda CV axle.

When to Perform CV Axle Service#

Important

Prompt attention to a torn CV boot can prevent costly axle replacement.

Consider performing this service if:

• A visual inspection reveals a torn, cracked, or damaged CV boot.
• Grease is observed leaking from a CV boot.
• You hear clicking, popping, or grinding noises from the axle, particularly during turns or acceleration, which may indicate advanced joint wear.
• The axle is removed for other service, providing an opportunity for preventative maintenance.

Required Tools and Materials#

Before beginning, gather the necessary tools and materials:

• Basic Hand Tools: Socket set, wrenches, pliers, screwdrivers.
• Specialized Tools: Torque wrench, snap ring pliers (internal and external), large C-clamp or press (for some joint types).
• Cleaning Supplies: Parts cleaner (e.g., brake cleaner, solvent), shop rags, wire brush.
• Lubricants & Sealants:
• New CV joint grease (specific type for Honda CV joints, typically molybdenum disulfide-based).
• New CV boots and clamps (if replacing).
• New cotter pins and axle nuts (recommended for replacement).
• Safety Gear: Safety glasses, gloves.

Caution

Always use appropriate safety gear and follow all safety precautions when working under a vehicle. Secure the vehicle properly on jack stands.

CV Axle Service Procedure#

This procedure assumes the CV axle has been removed from the vehicle. Refer to the Honda factory service manual for specific instructions on axle removal and reinstallation for your particular model.

1. Axle Disassembly and Boot Removal#

1. Secure the Axle: Place the axle in a vise with soft jaws to prevent damage.
2. Remove Outer Boot:

• Cut and remove the old boot clamps.
• Slide the boot off the outer joint.

3. Disassemble Outer Joint (if necessary):

• Depending on the joint type (e.g., Rzeppa), it may be possible to clean and regrease without full disassembly. If full disassembly is required, carefully remove the snap ring securing the joint to the shaft.
• Carefully slide the joint off the shaft. Note the orientation of all components.

4. Remove Inner Boot:

• Cut and remove the old boot clamps.
• Slide the boot off the inner joint.

5. Disassemble Inner Joint:

• Typically, the inner joint (tripod joint) is secured by a snap ring. Remove the snap ring.
• Carefully slide the tripod assembly off the shaft.
• Remove the tripod bearings from the spider assembly. Keep components organized.

2. Cleaning and Inspection#

Warning

Use parts cleaner in a well-ventilated area and avoid skin contact.

1. Clean All Components:

• Thoroughly clean all old grease from the axle shaft, joints, cages, balls, and races using a suitable parts cleaner. Ensure all traces of old, contaminated grease are removed.
• Use a wire brush for stubborn deposits if necessary, but be careful not to damage machined surfaces.

2. Inspect Components for Wear:

• Joints (Outer & Inner): Inspect the bearing surfaces (races) for pitting, scoring, grooves, or excessive wear.
• Balls/Bearings: Check for flat spots, pitting, or discoloration.
• Cages: Look for cracks, bends, or excessive wear.
• Axle Shaft: Inspect splines for damage or twisting.
• Boots: If reusing, inspect for any signs of cracking, tearing, or hardening. It is generally recommended to replace boots when performing this service.

Important

Any significant wear or damage to the joint components necessitates replacement of the entire CV joint or axle assembly, as regreasing will not resolve mechanical wear.

3. Regreasing and Reassembly#

1. Apply New Grease:

• Liberally pack the new, specified CV joint grease into the joint assembly. Ensure all bearing surfaces, balls, and cages are thoroughly coated.
• Apply a generous amount of grease inside the new boots.

2. Reassemble Inner Joint:

• Carefully reassemble the tripod bearings onto the spider assembly, ensuring correct orientation.
• Slide the new inner boot onto the axle shaft (small end first).
• Slide the tripod assembly onto the axle shaft, ensuring it seats correctly.
• Install the snap ring to secure the tripod assembly.

3. Reassemble Outer Joint:

• Slide the new outer boot onto the axle shaft (small end first).
• If the outer joint was disassembled, carefully reassemble it, ensuring correct orientation of the cage, balls, and races.
• Slide the outer joint onto the axle shaft.
• Install the snap ring to secure the outer joint (if applicable).

4. Install New Boots and Clamps:

• Position the boots correctly on the axle shaft and the joint housings.
• Install new boot clamps. Use a specialized boot clamp tool to properly tension and crimp the clamps, ensuring a secure, leak-free seal.
• Equalize Air Pressure: Before fully tightening the clamps, gently compress and expand the boot to equalize the internal air pressure. This prevents the boot from ballooning or collapsing during operation.

4. Axle Reinstallation#

1. Install Axle: Reinstall the CV axle into the vehicle, following the specific procedures outlined in your Honda factory service manual.
2. New Hardware: Always use a new axle nut and cotter pin.
3. Torque Specifications: Tighten all fasteners, especially the axle nut, to the manufacturer's specified torque values. Refer to the factory service manual for these critical specifications.

Tip

After reinstallation, check for any unusual noises or vibrations during a test drive. If any persist, re-inspect the axle and surrounding components.

Conclusion#

Proper inspection, cleaning, and regreasing of Honda CV axles can prevent premature failure and save on replacement costs. Always prioritize using the correct type of CV joint grease and new boots with proper clamps for a lasting repair. When in doubt about specific procedures or torque values, consult the official Honda factory service manual for your vehicle model.