the best way to release the tire rod end from the stearing arm is this:
grab 2 hammers and swing the both athe the same time either side of the steeering arm... leving the nut on but loosely. you need to hit it with both hammers simultanisly in order to shock the taper locking the tire rod to steering arm, releasing the taper. may need a couple of hits, but this should do the trick. by leaving the nut on, its stops the tire rod end hittinfg the ground then you can undo the nut and remove the arm
i have done many a joint before and its worked a treat.... ( shown to me by my motor mechanic)........