Patent ID: 8192321

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