Are you trying to remove the driver side axle shaft out of the transmission? you need some leverage to get it out. You need some kind of wedge to place between the transmission and the axle shaft. There is a solid peice that you can use for leverage right below it. Place the prybar or wedge tool between the axle shaft and transmission. bang on the pry bar or wedge tool with a hammer to pop the axle out. It's a pain the ass. I don't know if I'm making any sense.
Edit: I've only replaced my driver side. not sure how the passenger side is done.