I did a jammed CV on a hub on a Subaru once by removing whole hub, bolting a wheel on and putting over a hole (a rubbish bin in my case), so the shaft is vertical, then soak in your fav lubricant, and smash with BFH (big something hammer). The extra weight of the wheel gives the hub mass to counteract the blow of the hammer, so more force goes into the axle/cv, also gravity helps being vertical.