Patent ID: 7674202
Filing Date: 2010-03-09
Classification: F16H

Abstract:
1. An eight speed automatic transmission comprising, in combination, first, second and third planetary gear sets each having first, second and third members, an input shaft coupled to said first member of said first planetary gear set, an output shaft coupled to said third member of said third planetary gear set, a first interconnecting member coupling said second member of said first planetary gear set with said first member of said second planetary gear set, a second interconnecting member coupling said second member of said second planetary gear set with said first member of said third planetary gear set, a first torque transmitting device selectively interconnecting said second member of said third planetary gear set with said input shaft, a second torque transmitting device selectively interconnecting said third member of said second planetary gear set with said second member of said third planetary gear set, a third torque transmitting device selectively interconnecting said third member of said first planetary gear set with said second member of said second planetary gear set, a fourth torque transmitting device selectively interconnecting said second member of said first planetary gear set with a stationary member, a fifth torque transmitting device selectively interconnecting said third member of said first planetary gear set with said stationary member, and a sixth torque transmitting device selectively interconnecting said second member of said third planetary gear set with said stationary member, wherein said first member of said first planetary gear set is a sun gear, said second member of said first planetary gear set is a planet gear carrier and said third member of said first planetary gear set is a ring gear, and whereby said torque transmitting devices may be engaged in various combinations of three to establish at least eight forward speed ratios between said input shaft and said output shaft.