I had to replace bearings in front axle 4x4 and wanted to replace bushing in knuckle since I was so close to them, I made a tool that would fit the inside diameter and the outside diameter to try to knock them out, no luck I have been working on the top one which is bigger, and have had no luck to get it to move, hate to hammer it very hard, scared I may break the casting axle knckle housing. Any information would be much appreciated. Joe