Patent ID: 7008346

Claim:
A multi-speed transmission comprising: an input shaft; an output shaft; a planetary gear arrangement having first, second and third planetary gear sets, each planetary gear set having first, second and third members; said input shaft being continuously interconnected with said first member of said first planetary gear set, and said output shaft being continuously interconnected with said first member of said third planetary gear set; a first torque-transmitting mechanism selectively interconnecting said second member of said second planetary gear set with a transmission housing; a second torque-transmitting mechanism selectively interconnecting said third member of said second planetary gear set with said transmission housing; a third torque-transmitting mechanism selectively interconnecting said second member of said first planetary gear set with said third member of said second planetary gear set; a fourth torque-transmitting mechanism selectively interconnecting said first member of said first planetary gear set with said second member of said third planetary gear set; a fifth torque-transmitting mechanism selectively interconnecting said third member of said first planetary gear set with said transmission housing; a sixth torque-transmitting mechanism selectively interconnecting said second member of said first planetary gear set with said third member of said third planetary gear set; wherein fluid for applying said third and sixth torque-transmitting mechanisms is carried through a shaft which is connected to a sun gear of said first planetary gear set; and wherein said first member of said second planetary gear set and said first member of said third planetary gear set comprise a single elongated ring gear; said first, second, third, fourth, fifth and sixth torque-transmitting mechanisms being engaged in combinations of three to establish seven forward speed ratios and a reverse speed ratio between said input shaft and said output shaft.