Patent ID: 8210976

Claim:
A hydraulic control system for actuating a plurality of torque transmitting devices in a transmission, the hydraulic control system comprising: a pump for providing a hydraulic fluid; first, second, third, fourth, fifth, and sixth actuators for selectively actuating the plurality of torque transmitting devices; first, second, third, and fourth control devices, wherein the first control device is in communication with the pump, the second control device is in communication with the third actuator, the third control device is in communication with the fourth actuator, and the fourth control device is in communication with the sixth actuator; a first valve in communication with the pump and with the second, third, and fourth control devices, wherein the first valve is moveable between a drive position and a reverse position, a second valve in communication with the first valve, the first control device, the first actuator, the second actuator, and the third actuator, wherein the second valve is moveable between a first position and a second position, and wherein the first valve allows communication between the pump and the second, third, and fourth control devices when the first valve is in the drive position, and wherein the first valve allows communication between the pump and the first and fourth control devices and the second valve when the first valve is in the reverse position, and wherein the second valve allows communication between the first control device and the first actuator when the second valve is in the first position, and wherein the second valve allows communication between the first control device and the second and third actuators when the second valve is in the second position, and wherein the first and fourth control devices are configured to, allow hydraulic fluid to pass through the first and fourth control devices to engage at least one forward gear state and a reverse gear state when the first and fourth control devices are not activated.