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 and four fixed interconnections. 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 first and second 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.
