Some basic things about ball joints
In generic terms, there are some things that are common to all ball joints. Ball joints are usually either pressed in or bolted in place. The wheel, brake caliper and brake rotor may have to be removed in order to replace the ball joint. The tie rod may also have to be separated from the spindle. I have replaced ball joints where all you have to do is support part of the suspension, unbolt the ball joint, separate the ball joint from the spindle, and then bolt the new bolt joint in. But that was on a compact car that isn't very heavy. And how the manufacturer designed the front suspension will determine how difficult or easy it is to replace the ball joint. If the ball joint has to be pressed out of the control arm, then you will need a special tool called a "C-Frame assembly tool", or you will have to take the control arm to a shop and have the ball joint pressed out. I have beaten them out with a hammer and an impact socket. That not the "official", politically correct, and sanctioned safe way to do it, but it's worked for me and saved me money and time.
The ball joint will have to be separated from the spindle. Sometimes you need a ball joint separator to do that part of the job.
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It depends on the year, and whether it's 2WD or 4WD. I suggest entering your question again with the year. People have posted answers for specific year models. All Ford Rangers from 1993 to 1997 have "I-beam" front suspensions as opposed to the upper and lower control arms that most vehicles have. There is a detailed answer for replacing the upper and lower ball joints for '93 through '97 Ford Ranger ball joints at the question: "How do you change ball joints on 199X Ford Rangers?"
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