Patent ID: 9005072
Filing Date: 2015-04-14
Classification: F16H

Abstract:
1. A transmission comprising: an input member; an output member; first, second, third and fourth planetary gear sets each having first, second and third members; three interconnecting members each continuously interconnecting one of the first, second, and third members of the first, second, third and fourth planetary gear sets with another of the first, second, and third members of the first, second, third and fourth planetary gear sets; a grounding member for continuously interconnecting at least one of the members of the planetary gear sets to a stationary member; and six torque transmitting mechanisms wherein five of the six torque transmitting mechanisms are each selectively engageable to interconnect at least one of the first, second and third members of the first, second, third, and fourth planetary gear sets with at least one other of the first, second, third members of the first, second, third, and fourth planetary gear sets or a common structural member and wherein one of the six torque transmitting mechanisms is selectively engageable to interconnect at least one of the first, second and third members of the first, second, third, and fourth planetary gear sets with the stationary member, and wherein the six torque transmitting mechanisms are selectively engageable in combinations of at least four to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member.