Patent ID: 9581221
Date: 2017-02-28
CPC Classifications: F16H

Claim:
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, and wherein one of the first, second, and third members of the first, second, third and fourth planetary gear sets is fixed to a stationary member; three interconnecting members 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; and six torque transmitting mechanisms, and wherein each of the six torque transmitting mechanisms are 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 another of the first, second, third members of the first, second, third, and fourth planetary gear sets, a common rotating member, or 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.