Patent ID: 8197377
Filing Date: 2012-06-12
Classification: F16H

Abstract:
1. A multi-speed transmission comprising: a transmission housing having a front portion and a rear portion, the front portion including a first, a second, a third and a fourth apply fluid passages and a first dam fluid passage and the rear portion including a fifth apply fluid passage and a second dam fluid passage and; a first, a second, a third, and a fourth planetary gear sets each having a first, a second, and a third members; five torque-transmitting mechanisms each having at least an apply chamber, a dam chamber and a piston for selectively interconnecting at least one of the first, second, and third members with at least one other of the first members, second members, third members, and the transmission housing, and wherein the fifth apply fluid passage is in communication with the first apply chamber of the fifth of the five torque-transmitting mechanisms and the second dam fluid passage is in communication with the dam chamber of the fifth of the five torque-transmitting mechanisms; an input member continuously interconnected to the second member of the first planetary gear set and defining a longitudinal axis, the input member having: a first interconnecting member continuously interconnecting the first member of the third planetary gear set and the first member of the fourth planetary gear set, the first interconnecting member having: a second interconnecting member continuously interconnecting the first member of the first planetary gear set with the front portion of the transmission housing; a third interconnecting member continuously interconnecting the third member of the first planetary gear set with the first member of the second planetary gear set; a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third 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 an output member continuously interconnected to at least one of the second member of the fourth planetary gear set and the third member of the third planetary gear set, the output member having a fourth center bore in communication with the third center bore of the first interconnecting member; and wherein the second member of the second planetary gear set includes: