Patent ID: 7753820
Filing Date: 2010-07-13
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; a first interconnecting member continuously interconnecting the second member of the first planetary gear set with the second member of the second planetary gear set; a second interconnecting member continuously interconnecting the third member of the first planetary gear set with the first member of the second planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the first member of the third planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the third member of the fourth planetary gear set; a fifth interconnecting member continuously interconnecting the third member of the third planetary gear set with the second member of the fourth planetary gear set; and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of the first members, second members, third members, and a stationary element, and wherein the torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member.