Tools You'll Need:
* Jack and jack stands: Essential for safely lifting the vehicle. Never work under a vehicle supported only by a jack.
* Wheel chocks: To secure the vehicle on the jack stands.
* Lug wrench: To remove the wheel.
* Torque wrench: Crucial for tightening bolts to the manufacturer's specifications.
* Hammer and punch (or drift): To help remove and install components.
* Sockets and ratchets: Various sizes, likely including metric sizes.
* Pry bar: May be needed to separate components.
* Penetrating lubricant (PB Blaster, etc.): To help loosen rusted or seized bolts.
* New rear wheel bearing assembly: Make sure you get the correct part number for your vehicle.
* Bearing press (recommended): While you *might* be able to press the bearing in and out with other tools, a bearing press makes the job significantly easier and less likely to damage the components. Improper installation can lead to premature bearing failure.
* Clean rags and shop towels: To keep things clean and prevent contamination.
* Gloves: Protect your hands.
* Repair manual: Specific to your 2007 Ford Explorer Sport Trac.
General Steps (Consult your repair manual for specifics):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the wheels that are not being worked on.
2. Remove the Wheel: Loosen the lug nuts before jacking up the vehicle. Raise the vehicle safely using the jack and secure it on jack stands. Remove the wheel.
3. Remove the Brake Caliper and Rotor: Depending on your specific model, you'll likely need to remove the caliper (support it with a bungee cord or wire to prevent it from hanging on the brake line) and then remove the rotor. Some rotors may be secured with a center bolt, others might slide off. Your repair manual will be key here.
4. Remove the Axle Nut and Hub Assembly: This often requires a large socket and significant torque. The axle nut is usually very tight. Use penetrating lubricant if necessary and be prepared to apply considerable force.
5. Separate the Hub and Bearing Assembly: This is where a bearing press becomes invaluable. The old bearing and hub assembly need to be separated carefully without damaging the axle.
6. Install the New Bearing: Again, a bearing press is strongly recommended to install the new bearing assembly correctly. Improper installation will lead to bearing failure.
7. Reassembly: Carefully reassemble all components in reverse order of removal. Make sure the rotor and caliper are properly installed.
8. Torque Specifications: This is critical. Use a torque wrench to tighten all bolts to the manufacturer's specified torque values as listed in your repair manual. Incorrect torque can damage components and lead to premature failure or safety hazards.
9. Test Drive: After reassembly, test drive the vehicle at various speeds to ensure the bearing is functioning correctly. Listen for any unusual noises.
Important Considerations:
* ABS Sensor: The ABS (Anti-lock Braking System) sensor may be integrated into the hub assembly. Handle it carefully during removal and installation to avoid damage.
* Bearing Type: Some vehicles use sealed bearings that are replaced as a complete unit, while others might allow for individual bearing component replacement. Determine the type used in your Explorer Sport Trac.
* Professional Help: If you are not comfortable performing this repair, take your vehicle to a qualified mechanic. Incorrectly installed wheel bearings can lead to serious accidents.
This is a complex repair. Use a repair manual specific to your 2007 Ford Explorer Sport Trac to get the detailed, step-by-step instructions, diagrams, and torque specifications. Improper repair can lead to serious safety issues. If you're unsure about any step, it's best to seek professional help.
