My 54' 3100 is a 3-on-the-tree. I am trying to find out what the "name" of the trans is (like muncie whatever, or saginaw whatever). I have looked in both the factory assembley manual and my repair manual, the trans is designated as a "selective syncromesh" in the repair book. I have visually inspected the trans and it matches the photo in the manual, so i'm fairly sure its the original.