I tried out this exact one. It rode horrible. First give away that the ride would suck, was the low profile sidewalls of the rear tires (STIFF, NO GIVE!). The seat wasn`t able to smooth out the ride either. Actually, the seat felt like sitting on a piece of plywood with a thin piece of vinyl stapled to it. I`m a Kubota fan at heart, i own Kubota tractors, but their zero turn mowers, just feel cheap and are the worst of the ZT`s for ride that i tested. And those god awful deck height adjustment turn knobs......ugh......NOOOOOOOOOO!!!! Kubota did not get my money, this time, for their residential zero turn mowers. To be right out honest, they are over priced for what you`re getting, in my own opinion. Another thing that didn`t impress me with Kubota, was the rust showing up in various areas on BRAND NEW MACHINES! Alot of things are making me re-think staying with the brand as of lately for future purchases.
There is nothing wrong with the ZT3100 HydroGear transmissions either. There are tons of them out there that have run perfectly fine, IF, taken care of and serviced properly.