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 or nine torque transmitting
mechanisms and three 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
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 with the input clutches in combinations of three to establish at
least six forward speed ratios and at least one reverse speed ratio.
