A transmission for a vehicle includes a primary transmission arrangement, a transmission housing, an input shaft, and an output shaft. The primary transmission arrangement includes a first, second and third planetary gear set each including a first, a second and a third planetary member, said planetary members being a sun gear, a planet carrier and a ring gear. The transmission arrangement further includes five shift elements engageable in combinations of two to obtain six forward gear stages, wherein the ring gear of the first planetary gear set and the planet carrier of the second planetary gear set are operatively connected to each other, the ring gear of the second planetary gear set and the planet carrier of the third planetary gear set are operatively connected to each other, and two planetary members of the third planetary gear set are selectively connectable to each other.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

Provided herein is a dual clutch transmission including a reverse countershaft that is selectively engaged with at least one primary shaft and provides speed ratio changes without torque interruption and a compact axial arrangement.

A power transmission apparatus may include a first input shaft fixedly connected to an engine output shaft, a second input shaft mounted external to the first input shaft, a third input shaft mounted and external to the second input shaft, an intermediate shaft and first and second output shafts, an idle shaft mounted in parallel with the second output shaft, a planetary gear mounted on an axis of the intermediate shaft, a plurality of gear sets the first, and second output shafts, the idle shaft, and the planetary gear set, a first synchronizer mounted on the first output shaft, a second synchronizer mounted on the second output shaft, selectively receiving a torque from the third input shaft through two paths, and transmitting the received torque to the second output shaft, and four clutches each of which facilitating selective connection.

A power transmission apparatus may include a first input shaft, a second input shaft external and selectively connectable to the first input shaft, a third input shaft external to the second input shaft and selectively connectable to the first input shaft, an intermediate shaft, first and second output shafts, first and second idle shafts, a planetary gear set mounted on the intermediate shaft and having first to elements and where two elements are selectively connectable to the intermediate shaft, a plurality of gear sets allowing torque flows between the various shafts and the planetary gear set, first and second synchronizers respectively mounted on the first and second output shafts, selectively receiving a torque from the second and third input shafts through two paths, and transmitting the received torque to the first and second output shaft, and four clutches.

A multiple speed transmission includes an input shaft, an output shaft, a first planetary gearset having a first member, a second member, and a third member, and a second planetary gearset having a first member, a reaction member, a second member, and a third member. The transmission also includes a plurality of interconnecting members each connected between at least one of the first and second planetary gearsets and at least another of the first and second planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms which are selectively engageable in combinations of at least two to establish between seven and nine forward speed ratios and between two and four reverse speed ratios between the input shaft and the output shaft.

A power transmission apparatus may include a first input shaft fixedly connected to an engine output shaft, a second input shaft mounted external to the first input shaft, a third input shaft mounted and external to the second input shaft, an intermediate shaft and first and second output shafts, an idle shaft mounted in parallel with the second output shaft, a planetary gear mounted on an axis of the intermediate shaft, a plurality of gear sets the first, and second output shafts, the idle shaft, and the planetary gear set, a first synchronizer mounted on the first output shaft, a second synchronizer mounted on the second output shaft, selectively receiving a torque from the third input shaft through two paths, and transmitting the received torque to the second output shaft, and four clutches each of which facilitating selective connection.

A power transmission apparatus may include a first input shaft, a second input shaft external and selectively connectable to the first input shaft, a third input shaft external to the second input shaft and selectively connectable to the first input shaft, an intermediate shaft, first and second output shafts, first and second idle shafts, a planetary gear set mounted on the intermediate shaft and having first to elements and where two elements are selectively connectable to the intermediate shaft, a plurality of gear sets allowing torque flows between the various shafts and the planetary gear set, first and second synchronizers respectively mounted on the first and second output shafts, selectively receiving a torque from the second and third input shafts through two paths, and transmitting the received torque to the first and second output shaft, and four clutches.