Abstract: A transmission hydraulic control system for an automobile transmission includes a hydraulic circuit in fluid communication with the at least one torque transmitting device, a transmission pump in fluid communication with the hydraulic circuit and adapted to provide pressurized hydraulic fluid to the hydraulic circuit, an accumulator in fluid communication with the hydraulic circuit and having an annular cylindrical shape concentric with a center-line of the automatic transmission, an annular piston moveable between a first position and a second position, and a spring adapted to bias the piston to the first position, and a valve mechanism positioned between the hydraulic circuit and the accumulator, the valve mechanism adapted to selectively allow fluid communication between the accumulator and the hydraulic circuit.

Abstract: A hydraulic control system for a transmission of a motor vehicle includes a source of pressurized hydraulic fluid that communicates with an analog electronic transmission range selection (ETRS) subsystem or a manual valve. The ETRS subsystem includes an ETRS valve, a park servo, a park mechanism, a mode valve, and a plurality of solenoids. The ETRS and manual valve communicate with a clutch actuator subsystem that engages a one-way clutch and six clutches/brakes.

Abstract: A hydraulic control system for a transmission of a motor vehicle includes a source of pressurized hydraulic fluid that communicates with an analog electronic transmission range selection (ETRS) subsystem or a manual valve. The ETRS subsystem includes an ETRS valve, a park servo, a park mechanism, a mode valve, and a plurality of solenoids. The ETRS and manual valve communicate with a clutch actuator subsystem that engages a one-way clutch and six clutches/brakes.

Abstract: A transmission for a vehicle propulsion system includes a transmission housing defining a sump volume and valve body side cover volume separated by a side wall from the sump volume, a valve operable to selectively connect the valve body side cover volume with the sump volume through a fluid flow passage, a source of selectively pressurizable fluid, and an orifice connecting the source of selectively pressurizable fluid to the fluid flow passage.