Hi folks...i have a B2650 Kubota...3 years old 650 hrs. Im finding the hydro control is allowing the tractor to suddenly start moving forward without notice. It sometimes does not always go immediately back to neutral and you have to kindof play with it to find neutral. I got out of the tractor the other day after setting the brake and i thought i was in neutral... suddenly i heard it fighting the brake to move forward... this is scary and dangerous of course. Anyone else ever see this... do i have to replace the control valve??? thanks