Does anyone know the proper way to remove part number 15 in the Real OEM diagram? It's the ball joint that point downward and connects the lower control arm to the steering knuckle.

It seems to be pressed into the knuckle and then bolted in. Mine will not come out. It looks like you'd have to remove the axle nut and brakes, and then press out the axle to get a straight shot at the top of the ball joint. Then hammer it out from above. Does anyone have experience with this?