Patent Number: 8,496,556

Title: Multi-speed transmission

Abstract: A transmission includes an input and output member, four planetary gear sets each having first, second and third members, five interconnecting members continuously interconnecting members of the four planetary gear sets and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of another of the first members, second members, third members, and a stationary member. 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.

Inventors: Wittkopp; Scott H. (Ypsilanti, MI), Phillips; Andrew W. (Rochester, MN), Hart; James M. (Belleville, MI), Mellet; Edward W. (Rochester Hills, MI)

Assignee: GM Global Technology Operations LLC

International Classification: F16H 3/44 (20060101)

Expiration Date: 2021-07-30 0:00:00