Planetary transmissions with three gear sets and a stationary interconnecting member

A multi-speed transmission comprising:

• an input shaft;
• an output shaft;
• first, second and third planetary gear sets each having first, second and third members;
• said output shaft being continuously interconnected with a member of said planetary gear sets;
• a first interconnecting member continuously interconnecting said first member of said first planetary gear set with said first member of said second planetary gear set and a stationary member;
• a second interconnecting member continuously interconnecting said second member of said second planetary gear set with said first member of said third planetary gear set;
• a first torque-transmitting mechanism selectively interconnecting a member of said first, or third planetary gear set with said input shaft;
• a second torque-transmitting mechanism selectively interconnecting a member of said, second or third planetary gear set with said input shaft;
• a third torque-transmitting mechanism selectively interconnecting a member of said first or second planetary gear set with said input shaft or with a member of said third planetary gear set;
• a fourth torque-transmitting mechanism selectively interconnecting a member of said first planetary gear set with a member of said second or third planetary gear set;
• a fifth torque-transmitting mechanism selectively interconnecting a member of said third planetary gear set with a member of said first or second planetary gear set;
• and
• a sixth torque-transmitting mechanism selectively interconnecting a member of said first, second or third planetary gear set with another member of said first, second or third planetary gear set, the pair of members interconnected by said sixth torque-transmitting mechanism being different from the members interconnected with said input shaft by said first, second and third torque-transmitting mechanisms, respectively, and from the pairs of members interconnected by said third, fourth and fifth torque-transmitting mechanisms, respectively;
• said torque-transmitting mechanisms being engaged in combinations of three to establish at least seven forward speed ratios and at least one reverse speed ratio between said input shaft and said output shaft.