Patent ID: 8376893

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; a first rotary member interconnecting the first member of the first planetary gear set with the first member of the second planetary gear set; a second rotary member interconnecting the third member of the first planetary gear set with the second member of the second planetary gear set; a third rotary member interconnecting the second member of the first planetary gear set with the first member of the third planetary gear set and the input member; a fourth rotary member interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set; a first torque transmitting device selectively engageable to interconnect the first rotary member with the first member of the fourth planetary gear set; a second torque transmitting device selectively engageable to interconnect the second rotary member with the first member of the fourth planetary gear set; a third torque transmitting device selectively engageable to interconnect the fourth rotary member with at least one of the second member of the fourth planetary gear set and the output member; a fourth torque transmitting device selectively engageable to interconnect the fourth rotary member with the third member of the fourth planetary gear set; a fifth torque transmitting device selectively engageable to interconnect the third member of the fourth planetary gear set with a stationary member; and a sixth torque transmitting device selectively engageable to interconnect the second member of the third planetary gear set with the stationary member, and wherein the torque transmitting devices are selectively engageable to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member, and wherein at least three torque transmitting devices are disengaged in each of the plurality of forward speed ratios and the at least one reverse speed ratio.