Patent ID: 7798941

Claim:
A vehicle transmission having a hydraulic control system with a hydraulic clutch feed path, comprising: a hydraulically actuable clutch piston in communication with the clutch feed path; a pressure control valve configured to supply pressure to said clutch piston through the clutch feed path; an accumulator selectively hydraulically communicable with the clutch feed path, said accumulator having a damper configurable to selectively absorb pressure in excess of a predetermined range; a disconnect valve in dual hydraulic communication with the clutch feed path and said accumulator, said disconnect valve including a hydraulically actuable disconnect spool configured in a manner to selectively hydraulically disconnect said accumulator from the clutch feed path and the hydraulic control system upon actuation of said disconnect spool; and a control unit configured in a manner to actuate said disconnect spool, said control unit disconnected from said clutch feed path and said pressure control valve.