The ball joints on all of our trucks are built into the control arm because they are too thin. Also because the ball joint presses in from the bottom where the grease boot is makes it extremely hard to change them. Changing the control arms are as easy as a 15/16 socket on both sides and swapping them out however. I have found that MOOG makes a set of upper ball joints for the ranger though if you want to get creative and change them. I had to do a set a few years ago and since then, honestly I just change the control arms.