It is easy to test if it is frozen up. Just remove either the upper ball joint or the two top a-arm bushing bolts. The upright should then easily tilt outward and inward. If you cant budge it, then it is frozen. Be advised though, the axle spline will make it pull hard. If it pops when you attempt to take it out, it could also be frozen.
On mine, when I take off the axle, brakeline, and upper ball joint, it will fall down to the floor. It should move quite easily.
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