Patent ID: RE39960

Claim:
A transmission ( 1 ) for a motor vehicle having a capability of automatic shifting, the transmission ( 1 ) having three spider planetary sets ( 2 , 3 , 4 ) in which a first planetary set ( 2 ) is on an entry side of the transmission ( 1 ) , a third planetary set ( 4 ) is on an exit side of the transmission ( 1 ) and a second planetary set ( 3 ) is located between the first planetary set ( 2 ) and the third planetary set ( 4 ), the transmission ( 1 ) possessing first, second and third brakes ( 5 , 6 , 7 ) and first and second clutches ( 8 , 9 ) for the shifting of six forward gears and one reverse gear, and having one input shaft ( 10 ) and one output shaft ( 11 ) with the following combinations: the input shaft ( 10 ) is connected directly with a sun gear ( 16 ) of the second planetary set ( 3 ); the input shaft ( 10 ) is connectable by the first clutch ( 8 ) with a sun gear ( 12 ) of the first planetary set ( 2 ) and connectable with a spider ( 15 ) of the first planetary set ( 2 ) by the second clutch ( 9 ); the sun gear ( 12 ) of the first planetary set ( 2 ) is connectable with a housing of the transmission ( 1 ) by the first brake ( 5 ); and the spider ( 15 ) of the first planetary set ( 2 ) is connectable with the housing of the transmission by the second brake ( 6 ); wherein a sun gear ( 20 ) of the third planetary set ( 4 ) is freely rotatable with respect to the sun, the spider and the internal gears of the first and second planetary sets and is connectable solely with the transmission housing when the third brake ( 7 ) is engaged ; and the output shaft ( 11 ) is fixedly connected with a spider ( 19 ) of the second planetary set ( 3 ) and is fixedly connected with an internal gear ( 14 ) of the first planetary set ( 2 ) .