Patent ID: 6776738
Filing Date: 2004-08-17
Classification: F16H

Abstract:
A transmission comprising:an input shaft; an output shaft; a transmission housing; a first planetary gearset having first, second, and third members; a second planetary gearset having first, second, and third members; a third planetary gearset having first, second, and third members; a first member of the second planetary gearset and a first member of the third planetary gearset being continuously interconnected by an interconnecting member; a second member of the third planetary gearset being continuously interconnected with the transmission housing; said output shaft being continuously interconnected with at least one member of one of the planetary gearsets; said input shaft being only selectively connectible to respective members of the planetary gearsets through selectively engageable torque transmission mechanisms, six selectively engageable torque-transmitting mechanisms selectively connecting members of said planetary gearsets with said input shaft, said transmission housing, or other members of the planetary gearsets; said six torque transmitting mechanisms, being selectively connectible in combinations of four to establish at least seven forward speed ratios and one reverse speed ratio in the planetary gearsets; and at least two of said torque-transmitting mechanisms being selectively engageable between said input shaft and respective members of the planetary gearsets.