Coming down a slope less than say 20 deg the hydrostatic transmission prevents the machine from getting away. On steeper slopes, the force of gravity causes normal tractor type mowers to sledge out of control but this does not happen with the Climber. The differential lock enables both wheels to stay connected with the ground. On even steeper slopes, judicious use of the front brake pedal enables the operator to maintain complete control and even bring the machine to a complete halt instantly.