Steering Problem

I have a 69 chevelle with power steering, no tilt wheel. Last year, I replaced the steering gear box, which was leaking badly, but still worked fine. When I turn the wheel, it feels like the steering is catching on something. It's not a hesitation, but more mechanical and feels like its up near the steering wheel. Like I said, the gear is new, the suspension does not appear to be a problem and the steering column is not obstructed in any way. If anyone have any ideas, I would appreciate it

Jim