| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight of a transmission mechanism and form the transmission in a compact manner by shortening a high torque transmission system and to reduce the occurrence of a shift shock due to reduction of inertia torque, in a multistage automatic transmission for a vehicle. SOLUTION: A vehicle automatic transmission comprises a planetary gear set G to output a plurality of kinds of shift rotation as deceleration rotation and non-deceleration rotation; a deceleration planetary gear G1; an input shaft 11 on the inner peripheral side of the planetary gear set; first and third clutches C1 and C3 disengageably engaged with two different shift elements S2 and S3, respectively, of the planetary gear set through a deceleration planetary gear; and a second clutch C2 having an input shaft disengageably engaged with other shift elements C2 (C3) of the planetary gear set. A deceleration planetary gear and a third clutch to transmit high torque are arranged on one side of the planetary gear set and the first clutch C1 to transmit high torque is arranged on the other side thereof.
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