If I remember correctly there were two backhoes for the L3700 the BH 77 and the BH92. For those that don't know the L3700 is a "special package" of the L3400 tractor. The "special package" was the Front end loader, and the drawbar, suspension seat, and cruise control were sold as options. It also was supposed to have 1 more horsepower than the L3400, but some of the late production L3400 had the same horsepower rating and had a sticker on them that said "extra power". My 2010 had such a sticker. I suspect but do not know for sure, that the current L3200 and L3800 tractors have the same backhoes now as the L3400 and L3700 did back then. A trip to your dealer would confirm that.