Here's a general outline of the process:
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Use jack stands to securely support the vehicle. Never work under a vehicle supported only by a jack. Wear safety glasses and gloves.
* Gather Tools: You'll need a jack, jack stands, wheel chocks, socket wrench set (metric), possibly a breaker bar, axle nut socket (usually large), a ball joint separator (pickle fork or similar), possibly a hammer and punch, penetrating oil (like PB Blaster), a new axle shaft (get the correct one for your car - there are differences!), and potentially a CV joint boot clamp pliers.
* Consult a Repair Manual: A Haynes or Chilton manual for your specific year and model Eclipse is *essential*. It will have diagrams, torque specifications, and detailed instructions that are crucial for success.
2. Removing the Wheel and Brake Caliper:
* Remove the wheel.
* Remove the brake caliper (support it with wire or a bungee cord to avoid stressing the brake line). You may need to unbolt the caliper bracket to get sufficient clearance.
3. Disconnecting the Axle:
* Outer CV Joint: This is usually the trickiest part. You'll need to separate the outer CV joint from the spindle. A ball joint separator (pickle fork) is often used, but be careful not to damage the boot. Penetrating oil beforehand is highly recommended.
* Inner CV Joint: This is connected to the transmission. You'll need to disconnect this joint. This often involves removing a retaining clip or bolt, depending on the specific axle design. Again, a repair manual is essential to understand the specific procedure for your vehicle. This may also require separating the axle from the transmission – this usually involves sliding the axle out of the transmission.
4. Removing the Axle Shaft:
* Once the inner and outer CV joints are disconnected, the axle shaft should be able to be pulled out of the transmission and hub assembly.
5. Installing the New Axle Shaft:
* Installation is generally the reverse of removal. Ensure the new axle shaft is correctly seated in both the transmission and the hub.
* Pay close attention to how the inner CV joint is aligned with the transmission. Misalignment can cause damage and premature failure.
* Install the outer CV joint, making sure the boot is properly seated.
6. Reassembly:
* Reinstall the brake caliper and wheel.
* Tighten all fasteners to the manufacturer's specified torque (found in your repair manual).
7. Testing:
* Lower the vehicle carefully.
* Test drive the car at low speed, checking for unusual noises or vibrations.
Important Considerations:
* Drive Axles are Not Always Interchangeable: Left and right axles are usually not interchangeable. Order the correct replacement axle specifically for the right front side of your 1994 Mitsubishi Eclipse.
* CV Boot Damage: If the CV boot is damaged during removal, it must be replaced to prevent damage to the CV joint from dirt and moisture.
* Torque Specifications: Failure to tighten bolts and nuts to the correct torque specifications can lead to premature failure and potential safety hazards. Use a torque wrench and consult your repair manual.
This is a simplified overview. It is strongly recommended that you consult a repair manual specific to your vehicle before attempting this repair. If you're not comfortable with this type of repair, take your car to a qualified mechanic. Incorrect installation can lead to significant damage to your vehicle and potentially dangerous driving conditions.
