Here's a general overview of the process. Remember, this is NOT a complete guide, and deviations may exist depending on your specific vehicle. Improper installation can lead to serious safety issues.
Tools You'll Likely Need:
* Jack and jack stands: Essential for safely lifting the vehicle.
* Wheel chocks: Crucial for safety.
* Lug wrench: To remove the wheel.
* Socket set and wrenches: Various sizes will be needed.
* Torque wrench: Absolutely necessary for tightening bolts to the correct specifications.
* Hammer and punch: Possibly needed for stubborn parts.
* Press or bearing separator: To remove and install the bearings. This is the most specialized tool and often requires renting or borrowing.
* Penetrating oil (PB Blaster or similar): To help loosen rusted or seized bolts.
* New rear hub assemblies (or individual bearings and races if you're replacing only the bearings): Buy quality parts.
* Grease: For repacking the new bearings.
* Safety glasses and gloves: Protect yourself.
General Steps (Consult your repair manual for precise details):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Raise the vehicle securely using a jack and jack stands.
2. Remove the Wheel and Brake Components: Remove the wheel, brake caliper (support it to prevent hanging on the brake line), rotor, and potentially the brake backing plate. You might need to remove the e-brake cable.
3. Remove the Axle Flange Nut: This is often very tight. Use a breaker bar or impact wrench. The nut might be retained by a cotter pin; remove it first.
4. Remove the Axle Flange: Separate the axle flange from the hub. This often requires specialized tools or careful hammering. Again, your repair manual will be vital here.
5. Remove the Hub Assembly: The hub assembly, which contains the bearing, should now be separable from the backing plate and axle. This may involve removing retaining clips or bolts.
6. Bearing Removal: This is where the press or bearing separator is crucial. You'll need to carefully press out the old bearings from the hub assembly.
7. Bearing Installation: Using the press, carefully press the new bearings into the hub assembly. Ensure they're seated correctly.
8. Reassembly: This is the reverse of the disassembly process. Pay close attention to the order of parts, and use your repair manual to confirm each step.
9. Torque Specifications: Use the torque wrench to tighten all bolts and nuts to the manufacturer's specifications. Incorrect torque can lead to premature failure or damage.
10. Test Drive: After reassembly, take a short test drive to ensure everything is functioning correctly. Listen for any unusual noises from the rear axle.
Important Considerations:
* ABS Sensors: The ABS sensor may be attached to the hub assembly. Be careful not to damage it during removal and reinstallation.
* Brake Components: Be mindful of brake fluid and avoid contamination.
* Torque Specifications: Absolutely critical. Use the correct torque values specified in your repair manual.
* Professional Help: If you are not comfortable with this level of automotive repair, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to serious safety hazards.
This is a simplified overview. Always consult a repair manual specific to your 2002 Ford Explorer Sport Trac before attempting this repair. Ignoring this advice could lead to damage to your vehicle or injury to yourself.
