usually a pry bar will reveal any wear especially if the weight of the car is supported under the lower control arm.There should be no movement at all. These items were often serviced by replacing the complete assembly, control arm and all. They are best assembled in a jig and you will often find both the cross shaft and the end caps (bushings) will need to be replaced. It is easy to remove the entire assembly for bench servicing by first, supporting the weight of the car under the lower control arm and under the frame then removing the upper pivot that threads through the camber adjustment, then the shock absorber and the four bolts that hold the control arm pivot to the frame.