Patent ID: 7946945
Filing Date: 2011-05-24
Classification: F16H

Abstract:
1. A transmission comprising: an input member; an output member; a first, second, and third planetary gear set each having a first, second, and third member; a first, second, third, and fourth co-planar gear set each having a first gear intermeshed with a second gear; a first rotary member formed by interconnecting the second gear of the second co-planar gear set and the third member of the first planetary gear set; a second rotary member formed by interconnecting the third members of the second and third planetary gear sets; a third rotary member formed by interconnecting the first member of the first planetary gear set and the second member of the second planetary gear set; a fourth rotary member formed by interconnecting the first member of the second planetary gear set and the second member of the third planetary gear set; and five torque transmitting mechanisms each selectively engageable to interconnect one of the first members, second members, third members, first gears, second gears, first rotary member, second rotary member, third rotary member, and fourth rotary member with at least one other of the first members, second members, third members, first gears, second gears, first rotary member, second rotary member, third rotary member, fourth rotary member, and a stationary element, and wherein the torque transmitting mechanisms are selectively engageable to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member, and wherein at least two torque transmitting devices are disengaged in each of the at least eight forward speed ratios and the at least one reverse speed ratio.