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, seven or 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 two input clutches
alternately connect the engine to realize odd and even speed ratio
changes. 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 five forward speed ratios and
at least one reverse speed ratio.
