That said, here's a general outline of the process. Specific details may vary slightly depending on the exact rear axle configuration of your Ranger (e.g., 8.8-inch or 7.5-inch). Always consult a repair manual specific to your year and model for precise instructions and torque specifications.
Tools You'll Likely Need:
* Wheel Hub Removal Tool: Essential for separating the wheel hub from the axle flange.
* Axle Nut Socket: A very large socket (often 1 1/16" or similar) is needed. This nut is usually very tight. You may need an impact wrench.
* Bearing Puller (Two-Jaw or Three-Jaw): A specialized puller is required to remove the bearings from the axle housing.
* Hammer and Punch: For carefully removing retaining rings, circlips, and other components.
* Pry Bar: May be helpful for separating components.
* Torque Wrench: Absolutely crucial for tightening components correctly to avoid damage.
* Jack and Jack Stands: To safely lift and support the vehicle.
* Wheel Chocks: To prevent accidental rolling.
* Shop Manual: A repair manual specific to your 2003 Ford Ranger is invaluable.
General Steps (Highly Simplified):
1. Safety First: Disconnect the battery's negative terminal. Secure the vehicle on jack stands. Engage the parking brake and use wheel chocks.
2. Remove the Wheel and Brake Components: Remove the wheel, brake caliper, rotor, and potentially the axle dust shield.
3. Remove the Axle Nut: This nut is extremely tight. Use a breaker bar or impact wrench to loosen it.
4. Remove the Axle Flange: Use the wheel hub removal tool to separate the wheel hub and axle flange.
5. Remove the Axle Shaft: The axle shaft should now be able to be slid out of the differential. This may require some persuasion.
6. Remove the Bearings: This is the trickiest part. Use the bearing puller to carefully remove the bearings from the axle housing. There will likely be retaining rings or other components to remove before you can access the bearings themselves. Work slowly and methodically to avoid damaging the axle housing.
7. Clean and Inspect: Once the bearings are removed, thoroughly clean the axle housing and inspect it for damage.
8. Installation: Installation is the reverse of removal, but requires careful attention to proper bearing seating and torque specifications. Use new bearings and seals.
Important Considerations:
* Preload: Rear axle bearings require proper preload for correct operation. Incorrect preload can lead to premature bearing failure. You'll need a dial indicator or similar tool to properly measure this (and the knowledge of how to use it).
* Seals: Replace the axle seals when you replace the bearings. Damaged seals will lead to leaks and bearing failure.
* Differential Fluid: You'll need to refill the differential with the correct type and amount of gear oil after reassembly.
Again, this is a simplified overview. Refer to a repair manual specific to your vehicle for detailed instructions and torque specifications. Attempting this repair without proper knowledge and tools could seriously damage your vehicle. If you are unsure about any step, consult a qualified mechanic.
