How do you replace ball joint on 2003 navigator?

To replace the ball joint on a 2003 Lincoln Navigator, start by safely lifting the vehicle and removing the front wheel. Next, disconnect the brake caliper and rotor, then remove the lower control arm from the steering knuckle and any necessary components to access the ball joint. Use a ball joint separator tool to detach the old ball joint, then press in the new one, reassemble all components, and ensure everything is tightened to the manufacturer's specifications before replacing the wheel. Always consult a repair manual for specific torque values and safety precautions.