Multi-speed transmission

A transmission comprising:

• an input member;
• an output member;
• first and second planetary gear set assemblies each having first, second, third, and fourth members, wherein the output member is continuously interconnected with the third member of the second planetary gear set assembly;
• a first interconnecting member continuously interconnecting the second member of the first planetary gear set assembly with the first member of the second planetary gear set assembly;
• a first torque transmitting mechanism selectively engageable to directly interconnect the fourth member of the first planetary gear set assembly with a stationary member;
• a second torque transmitting mechanism selectively engageable to directly interconnect the third member of the first planetary gear set assembly with the stationary member;
• a third torque transmitting mechanism selectively engageable to directly interconnect the fourth member of the second planetary gear set assembly with the stationary member;
• a fourth torque transmitting mechanism selectively engageable to directly interconnect the third member of the first planetary gear set assembly with the input member;
• a fifth torque transmitting mechanism selectively engageable to directly interconnect the second member of the second planetary gear set assembly with the input member;
• a sixth torque transmitting mechanism selectively engageable to directly interconnect the first member of the first planetary gear set assembly with the input member, and
• wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member;
• and
• wherein the first planetary gear set assembly includes a first and a second planetary gear sets each having a first, second, and third members, wherein the first member of the first planetary gear set assembly includes the first member of the first planetary gear set, the second member of the first planetary gear set assembly includes the second member of the first planetary gear set directly interconnected to the third member of the second planetary gear set by a second interconnecting member, the third member of the first planetary gear set assembly includes the third member of the first planetary gear set directly interconnected to the second member of the second planetary gear set by a third interconnecting member, and the fourth member of the first planetary gear set assembly includes the first member of the second planetary gear set.

A transmission comprising:

• an input member;
• an output member;
• first, second, third and fourth planetary gear sets each having first, second and third members, wherein the output member is continuously interconnected to at least one of the second and third members of the third and fourth planetary gear sets;
• a first interconnecting member continuously interconnecting the second member of the first planetary gear set with at least one of the first and third members of the third and fourth planetary gear sets;
• a second interconnecting member continuously interconnecting the second member of the first planetary gear set with the third member of the second planetary gear set;
• a third interconnecting member continuously interconnecting the third member of the first planetary gear set with the second member of the second planetary gear set;
• a fourth interconnecting member continuously interconnecting a member of the third planetary gear set with a member of the fourth planetary gear set;
• a fifth interconnecting member continuously interconnecting a member of the third planetary gear set with a member of the fourth planetary gear set;
• a first torque transmitting mechanism selectively engageable to directly interconnect the first member of the second planetary gear set with a stationary member;
• a second torque transmitting mechanism selectively engageable to directly interconnect the third member of the first planetary gear set with the stationary member;
• a third torque transmitting mechanism selectively engageable to directly interconnect at least one of the first members of the third and fourth planetary gear sets with the stationary member;
• a fourth torque transmitting mechanism selectively engageable to directly interconnect the third member of the first planetary gear set assembly with the input member;
• a fifth torque transmitting mechanism selectively engageable to directly interconnect the second member of the second planetary gear set assembly with the input member, and
• a sixth torque transmitting mechanism selectively engageable to directly interconnect the first member of the first planetary gear set assembly with the input member;
• and
• wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member.