You should be able to replace the sector bushing with out pulling the box if you have room between the engine and box. You will need to pull the side cover off the steering box and the pitman arm from the shaft. If you have the room, the sector will slide right out. The seal will come out the tire side and the bushing you can drive out the engine side. You will also find a steel spacer sleave between the seal and bushing. I don't know what it does but just put it back where it came from.
If you can't get it out this way, you can loosen the box from the frame and lower it out the bottom. Just remove the column drop from the dash. It's really not necessary to pull the wheel if you don't want to. The steering shaft has bearings on both ends so just tighten them up from the end of the box. The little end of the sector has a 1/2" ID bearing in the housing cover. You may want to check it for wear before replacing it. I found if you cut a slot in the bearing with a hand heald saw blade, then chip it out with a punch, its not to bad of a job.
I recently changed my '37 over to the 41-46 gear box. I used the whole unit with a '46 wheel. It matches the original real close and if you didn't know the difference, you would never know it wasn't factory. The real problem with this is finding a good steering wheel. The material used during the war does not hold up well. The reproductions that were out, are now on hold again. I really couldn't tell much difference in driving. Its a little easyer at highway speed but down slow or parking is about the same. I am rebuilding the '37 box now to but back in. The '37 wheel I have is perfect shape. One other problem I ran into, is the upper bushing for the column on the 37-38's is no longer avalible. I am working on a new one using nylon or Maple wood.
I have two boxes apart now, let me know if you need a picture or more help, Joe
