My 4710 has the motion match on it. If i turn that on, then no matter what gear, like A range, i can push into a dirt pile, put the hydro pedal on the floor, and the tractor just starts spinning all the tires, no stalling at all. Would this be helpful if one was plowing? I would think the computer would just "gear" down the hydro while pulling. Im not sure how this correlates with the hydro relief valve, but I havent been able to get the wheels to stop spinning with the pedal to the floor. If motion match is on, the wheels will always spin, maybe really slow, but still spinning.