Patent ID: 7247119

Claim:
A multi-speed power transmission comprising: an input shaft; an output shaft; an input planetary gearset having first, second, and third members, said second member being continuously connected with said input shaft; an output planetary gearset having first, second, third, fourth, and fifth members; a first selectively engageable torque-transmitting mechanism interconnecting said third member of said input planetary gearset with said first member of said output planetary gearset; a second torque-transmitting mechanism selectively interconnecting said third member of said first planetary gearset with said second member of said output planetary gearset; a third torque-transmitting mechanism selectively engageable between said input shaft and said fifth member of said output planetary gearset; a fourth torque-transmitting mechanism selectively engageable to connect said second member of said output planetary gearset with a stationary housing; a fifth torque-transmitting mechanism selectively engageable to connect said fifth member of said output planetary gearset with said stationary housing; a sixth torque-transmitting mechanism selectively engageable to connect said fourth member of said output planetary gearset with said housing; a seventh torque-transmitting mechanism selectively engageable to connect said first member of said input planetary gearset with said housing; said third member of said output planetary gearset being continuously interconnected with said output shaft; said torque-transmitting mechanisms being selectively engaged in combinations of three to establish at least eight forward speed ratios and one reverse speed ratio in said planetary transmission between said input shaft and said output shaft.