Patent ID: 8029406

Claim:
An automatic transmission for a vehicle, comprising: a case including a sidewall; an input shaft; a speed reduction planetary gear set that comprises a stationary element which is held against rotation by the case, an input rotary element that receives the input rotation of the input shaft, and a reduced speed rotary element that outputs a reduced speed rotation at a speed less than that of the input rotation; a planetary gear unit that includes first, second, third, and fourth rotary elements that are arranged in a rotational speed relationship according to their gear relationships; a first input transfer clutch for selective transfer of the input rotation to the first rotary element; a second input transfer clutch for selective transfer of the input rotation to the third rotary element; a first speed reduction transfer clutch for transfer of a reduced speed rotation through the speed reduction planetary gear set to the first rotary element; a second speed reduction transfer clutch for transfer of a reduced speed rotation through the speed reduction planetary gear set to the second rotary element; a first brake for selectively stopping the rotation of the first rotary element by locking it to the case; and a second brake for selectively stopping the rotation of the third rotary element by locking it to the case; and wherein the automatic transmission outputs rotation from the fourth rotary element; wherein the first and second speed reduction transfer clutches are disposed on the speed reduction planetary gear set side relative to the planetary gear unit and have output side transfer members which are respectively linked to the first rotary element and the second rotary element; wherein the first input transfer clutch and the speed reduction planetary gear set are disposed on axially opposite sides of the planetary gear unit; wherein the first input transfer clutch has an output side transfer member which is linked to the first rotary element; wherein the second input transfer clutch and the planetary gear unit are disposed on the same axial side of the speed reduction planetary gear set; and wherein the second input transfer clutch has an output side transfer member which extends coaxially with and radially outward of the output side transfer members of the first and second speed reduction transfer clutches to link with the third rotary element.