That's pretty much the situation with my steering wheel, that's why I asked. When you say it turns sharper in one direction than the other, do you mean at full steering lock (wheel as far as it can go)? If so, you may want to look at the steering stops in the steering knuckle (I found one that was bent and allowed the wheel to the point of rubbing on the spring). The key-way on the pitman arm usually prevents you from putting it on wrong (or it will be WAY wrong if you do). Might also be a drag link adjustment.