I've always wanted to know what is the reason for Kubota putting a 3 speed pto on some tractors? My B6100 has a 3 speed and I dont think I've ever used #2 or #3, I did one time played with the #2 speed and it scared the hell out of me and didnt want to try the 3rd speed. If I rememeber correctly I had a bush hog on the back and it sounded like a chopper about to take flight! I want to say when I shifted the pto into the 2nd speed the bush hog didnt run long in the 2nd gear. So I was curious to know what the other 2 speeds are for.