Abstract: A controller (15) is provided of the type which may be utilized in a hydrostatic power steering system. The controller includes a fluid actuated displacement mechanism (21) comprising a stationary ring (47) and a moveable star (49) to meter fluid flow through the controller valving (19). A plug member (105) is operable to apply a braking force to the moveable member (49) and it cooperates with the housing (27) to define a fluid chamber (109). The housing defines a fluid passage (111, 113, 117, 119) between the fluid chamber and the controller valving (19). The controller valving in the housing defines a drain passage (95, 99, 97) to drain the fluid chamber (109) when the controller valving is in its first operating position (FIG. 4 ) and to restrict the drain and allow pressure to increase in the fluid chamber (109) when the valving is approaching its maximum displacement position (FIG. 5).