Is the tie-rod disconnected at both ends? If so, see what else binds up. As az said, a tie-rod end is supposed to be very tight when it's good. So much so, that you should not even be able to spin it in it's socket by hand. At least not easily.
While it's disconnected, twist the knuckles to test the ball joints and u-joints on each side. If that's ok, then turn the steering wheel to see if you still feel binding. With nothing else connected, then any binding is either in the steering column/shaft assembly, or the box itself.
Paul