Patent ID: 8033949

Claim:
A transmission comprising: an input member; an output member; first, second, third and fourth planetary gear sets including first, second, third, and fourth rotational members, wherein the input member is fixedly connected with the second planetary gear set and the output member is fixedly connected with the fourth rotational member; and first, second, third, fourth, and fifth torque-transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, third, and fourth planetary gear sets with at least one other of the first planetary gear set, the second planetary gear set, the third planetary gear set, the fourth planetary gear set, and a stationary member, wherein the first, second, and fifth torque-transmitting mechanisms are engaged to define the reverse gear ratio, the first, second, and fourth torque-transmitting mechanisms are engaged to define a first gear ratio, the first, second, and third torque-transmitting mechanisms are engaged to define a second gear ratio, the second, third, and fourth torque-transmitting mechanisms are engaged to define a third gear ratio, the second, third, and fifth torque-transmitting mechanisms are engaged to define a fourth gear ratio, the second, fourth, and fifth torque-transmitting mechanisms are engaged to define a fifth gear ratio, the third, fourth, and fifth torque-transmitting mechanisms are engaged to define a sixth gear ratio, the first, fourth, and fifth torque-transmitting mechanisms are engaged to define a seventh gear ratio, and the first, third, and fifth torque-transmitting mechanisms are engaged to define an eighth gear ratio.