RUST, crud, corrosion hold them. try PB blaster to free it, if not then, turn the steer wheel so the shaft is all the way in. then take a block of wood, put on the end of the shaft and tap, then tap harder. be careful not to mushroom the head of the shaft. if it gets even with the tilt tube, and still won't come out, get a drift pin. (rod about the same size) and drive it on thru. the only way to get one out.