Patent ID: 7462126

Claim:
A vehicular automatic transmission capable of attaining a multi-stage shift, comprising: an input shaft; a reduction planetary gear is composed of a double pinion planetary gear having: a first sun gear whose rotation is fixed; a first pinion gear engaging with said first sun gear; a second pinion gear engaging with said first pinion gear; a first carrier rotatably supporting said first and second pinion gears and always linked with said input shaft; and a first ring gear engaging with said second pinion gear and outputting a reduced rotation reduced than an inputted rotation of said input shaft; a planetary gear set having at least four rotary elements, i.e. a first rotary element, a second rotary element, a third rotary element, and a fourth rotary element, a case having a boss portion; at least two reduction transmitting clutches for enabling said transmission of said reduced rotation through said reduction planetary gear comprise a first clutch and a third clutch, said first clutch is configured to transmit said reduced rotation to said second rotary element, said third clutch is capable of transmitting said reduced rotation to said first rotary element; an input transmitting clutch for enabling said transmission of said inputted rotation to said first rotary element comprises a fourth clutch; a second clutch is configured to transmit said inputted rotation to said third rotary element; a first braking is capable of fixing said first rotary element with said case; a second braking is capable of fixing said third rotary element with said case; an output member is linked to said fourth element, wherein; a hydraulic servo of said fourth clutch is disposed axially on an opposite side from said planetary gear set to said reduction planetary gear; and said fourth clutch is linked to said first rotary element via an output side member of said third clutch.