My good friend Joe just bought a 1850 fwa at a auction &amp; he asked me to haul it home for him. Of corse before we loaded it I had to do a good walk around &amp; check out his new prize. The tractor looked to be in graet orignal shape including the paint.Just a good overall noviolated tractor .I then looked at the rear end &amp; saw that it had  1950-T style axles long housing &amp; the tapered down axle shafts for the bigger bull gears. I don't know much about the FWA tractors but did this rear end come on or was it a option for the 1850 FWA?? It sure looks to be orignal.  The paint on the rear end matches the rest of the tractor &amp; the bolt heads all look to be untouched. Can anyone give us some info about this?? Thanks Steve