Eight-speed automatic transmission has five torque-transmitting clutches that are engageable to the gears, carriers and transmission housing in combinations of three to establish eight forward speed ratios and one reverse speed ratio

摘要

One interconnecting shaft (42) interconnects the ring gear (14A) of one planetary gear set (14) with the transmission housing (50). Second shaft (44) interconnects the planet gear carrier (14B) of first set with the sun gears (16C,18C) of second and third sets (16,18). Third shaft (46) interconnects the carriers (16B,18B) of second and third sets. Five torque-transmitting clutches (26,28,30,32,34) are engageable to the gears, carriers and housing in combinations of three to establish eight forward speed ratios and one reverse speed ratio between the input shaft (12) and output shaft (22).