What you'll need:
* Shop Manual: A factory service manual for your specific year and model F-150 is crucial. It will provide detailed instructions, torque specifications, and diagrams.
* Jack and Jack Stands: Safely supporting the truck is paramount. Never work under a vehicle supported only by a jack.
* Wheel Chocks: To prevent the truck from rolling.
* Socket Set and Wrenches: A complete set, including metric and standard sizes.
* Ball Joint Separator: This specialized tool is essential for separating the ball joint from the knuckle. Various types exist (pickle forks, hydraulic separators), and the best type will depend on your truck and your access. A pickle fork can damage the knuckle if not used carefully.
* Ball Joint Press: While you *might* be able to remove the old ball joint with a hammer and punch, a press is much safer and less likely to damage the new ball joint or control arm.
* Torque Wrench: Absolutely essential for tightening the ball joints to the correct specification. Incorrect torque can lead to premature wear and failure.
* New Ball Joints: Make sure to get the correct part numbers for your truck. Get OEM or high-quality replacement parts.
* Grease: Pack the new ball joints with grease before installation.
* Penetrating Oil: This will help loosen rusted or seized components.
* Safety Glasses and Gloves: Always protect yourself.
General Steps (Consult your shop manual for precise details):
1. Safety First: Disconnect the battery's negative terminal. Secure the truck on jack stands. Chock the wheels.
2. Suspension Disassembly: This will involve removing the cotter pin, castle nut, and spindle nut from the steering knuckle. You may need to disconnect other suspension components depending on your specific F-150's configuration.
3. Ball Joint Removal: This is where the ball joint separator and press come in. Carefully separate the ball joint from the knuckle and control arm using the correct tools.
4. Installation of New Ball Joints: Press the new ball joints into the control arm using the ball joint press.
5. Reassembly: Reassemble all components in the reverse order of disassembly, ensuring proper alignment and torquing everything to the specifications in your shop manual.
6. Alignment: After replacing ball joints, you must have a wheel alignment done by a professional. This is critical for safe and proper handling.
Important Considerations:
* Rust: On a 1985 truck, rust is a major concern. Penetrating oil will be your friend, but you may encounter significant resistance.
* Tools: Improper tools can easily damage components. Invest in the correct tools or seek professional help.
* Professional Help: If you're not comfortable with this repair, take your truck to a qualified mechanic. The cost of professional repair is far less than the cost of a serious accident caused by improperly installed ball joints.
This is a simplified overview. Refer to a shop manual for detailed, step-by-step instructions specific to your 1985 Ford F-150. Remember, safety is paramount. If you're unsure about any step, seek professional assistance.
