If you're not experienced, take it to a qualified mechanic. However, if you're determined to proceed, here's a general outline. This is *not* a complete, step-by-step guide, and variations exist depending on the specific truck's configuration. Consult a repair manual specific to your 1985 Ford F-150 for detailed instructions and torque specifications.
Tools You'll Likely Need:
* Ball joint press/separator: This is crucial. Trying to remove them with a hammer and punch will likely damage the components. A pickle fork is highly discouraged as it can damage the control arm.
* Socket wrench set (metric and possibly SAE): Various sizes will be needed.
* Torque wrench: Essential for proper tightening to prevent premature wear and failure.
* Jack and jack stands: Safety first!
* Wheel chocks: For added safety.
* Penetrating oil (PB Blaster or similar): Helps loosen rusted components.
* Hammer: Possibly needed for driving out certain components.
* Pry bar: May assist in separating components.
* New lower ball joints: Buy high-quality replacements.
* Appropriate grease: For lubricating the new ball joints.
* Safety glasses and gloves: Always protect yourself.
General Procedure (Highly Simplified):
1. Safety First: Disconnect the battery's negative terminal. Secure the vehicle on jack stands after safely lifting it with a jack. Engage the parking brake and use wheel chocks.
2. Remove the Wheel and Brake Caliper: Remove the wheel and then carefully remove the brake caliper and support it out of the way to prevent damage to the brake line.
3. Disconnect the Steering Linkage: Disconnect the tie rod end from the steering knuckle. You'll likely need a tie rod separator tool.
4. Remove the cotter pin and castle nut from the ball joint: This secures the ball joint to the steering knuckle.
5. Separate the Ball Joint: Use the ball joint press or separator to separate the ball joint from the steering knuckle. This is the most critical and potentially damaging step. Work slowly and carefully.
6. Remove the Ball Joint from the Control Arm: This may involve removing the cotter pin and castle nut (if applicable) securing the ball joint to the control arm. Again, you'll likely need a ball joint press to remove the ball joint.
7. Install the New Ball Joint: Use the ball joint press to carefully install the new ball joint into the control arm. Ensure it's properly seated.
8. Reassemble: Reverse the removal process, carefully reinstalling the ball joint into the steering knuckle, ensuring proper alignment. Tighten all fasteners to the manufacturer's specified torque.
9. Reconnect the Steering Linkage: Attach the tie rod end.
10. Reinstall the Brake Caliper and Wheel: Make sure the caliper is correctly positioned.
11. Lower the Vehicle: Carefully lower the vehicle to the ground.
12. Check your work: Inspect your work for any loose connections or leaks.
13. Alignment: After the repair, get a wheel alignment to ensure proper handling and tire wear. This is *essential*.
Disclaimer: This is a highly simplified overview. Improper installation can lead to serious injury or damage. Refer to a repair manual specific to your 1985 Ford F-150 for detailed, illustrated instructions and torque specifications. If you are not comfortable performing this repair, take your vehicle to a qualified mechanic.
