How do you remove and replace lower ball joints on 1997 Ford F-150 4x4?

To remove and replace the lower ball joints on a 1997 Ford F-150 4x4, first, safely lift the vehicle and remove the front wheels. Then, disconnect the brake caliper and rotor, and remove the steering knuckle from the lower control arm by removing the cotter pin, castle nut, and using a ball joint separator. After removing the old ball joint, press the new ball joint into the control arm using a ball joint press. Reassemble the components in reverse order, ensuring everything is properly torqued to specifications.