Patent ID: 7993238

Claim:
A transmission comprising: an input member; an output member; first, second, third, and fourth planetary gear sets each having first, second, and third members, wherein one of the first, second, and third members interconnects for common rotation with at least one other of the first, second, and third members to form each of at least four rotary members; a first torque transmitting mechanism selectively engageable to interconnect the second member of the first planetary gear set with the second member of the second planetary gear set; a second torque transmitting mechanism selectively engageable to interconnect the second member of the second planetary gear set with the third member of the fourth planetary gear set; a third torque transmitting mechanism selectively engageable to interconnect at least one of the input member and the second member of the first planetary gear set with a fourth of the at least four rotary members; a fourth torque transmitting mechanism selectively engageable to interconnect a first of the at least four rotary members with the fourth of the at least four rotary members; a fifth torque transmitting mechanism selectively engageable to interconnect the first member of the first planetary gear set with a stationary element; and a sixth torque transmitting mechanism selectively engageable to interconnect the third member of the fourth planetary gear set with the stationary element, and wherein the torque transmitting mechanisms are selectively engageable to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member, and wherein at least three of the torque transmitting mechanisms are disengaged in each of the at least nine forward speed ratios and the at least one reverse speed ratio.