Patent ID: 6620075
Filing Date: 2003-09-16
Classification: F16H

Abstract:
A family of transmissions having a plurality of family members 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 interconnecting member continuously interconnecting a first member of the first planetary gearset with a first member of the second planetary gearset; a second interconnecting member continuously interconnecting a second member of the second planetary gearset with a first member of the third planetary gearset; said output shaft being continuously interconnected with at least one member of one of the planetary gearsets; six torque-transmitting mechanisms arranged to provide selective interconnections between said input shaft and said planetary gearsets, between members of said planetary gearsets, between members of said planetary gearsets and said transmission housing; and said six torque-transmitting mechanisms being selectively engageable in combinations of four to establish at least seven forward speed ratios and one reverse speed ratio in said family member.