The only quick research i could find is that because you dont have hydro trans. Tats just a shot in the dark. Any reason in particular you just didnt go with the 3e which has backhoe option and hydrostat? Let me guess, manual trans. I cn understand that. Thats crappy the dealer didnt go in to fine detailI'm being told that I can't add a backhoe to a 3D series tractor. What is different that limits the ability?