The family of transmissions has a plurality of members that can be utilized
in powertrains to provide at least six forward speed ratios and one
reverse speed ratio. The transmission family members include four
planetary gear sets, two input clutches, eight torque transmitting
mechanisms, two fixed interconnections, and one grounded planetary gear
member. The invention provides a low content multi-speed dual clutch
transmission mechanism wherein the input clutches alternately connect the
engine to realize odd and even number speed ratio ranges. The torque
transmitting mechanisms provide connections between various gear members,
the fixed interconnections, the input clutches, the output shaft, and the
transmission housing, and are operated in combinations of three to
establish at least six forward speed ratios and at least one reverse speed
ratio. Further, two of the torque transmitting mechanisms and one of the
input clutches may be replaced with two input clutches, thereby reducing
content.
