I usually use a very large hammer and just keep whacking the knuckle when
separating this ball joint.
I don't take the ball joint loose when I can avoid it, however, because it
really is a large pain in the arse. It's difficult to get the hammer in.
I usually unbolt the knuckle from the strut and take the tie rod end
loose, and then pull out the top of the knuckle, freeing the axle for
removal.
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