Abstract: A single pinion type planetary gear unit and a double sun gear type planetary gear units are coaxially arranged on different positions of a given axis of an input shaft. First and second brakes are coaxially arranged on different positions of the given axis. The first brake selectively fixes a carrier of the double sun gear type planetary gear unit and the second brake selectively fixes an outer one of the sun gears of the double sun gear type planetary gear unit. First and second clutches are coaxially arranged on different positions of the given axis to transmit a speed changed rotation to rotational elements of the two planetary gear unit to provide an associated automatic transmission with a desired speed. The first clutch transmits the speed changed rotation to the ring gear of the single pinion type planetary gear unit, and the second clutch transmits the speed changed rotation to the sun gear of the single pinion type planetary gear unit.

Abstract: A first planetary gear unit is arranged to output a reduced speed rotation upon receiving a rotation from a prime mover. A speed change unit is arranged to which the reduced speed rotation is applied from the first planetary gear unit. The speed change unit is arranged at an opposite position of the prime mover with respect to the first planetary gear unit. An oil pump is arranged between the first planetary gear unit and the prime mover and driven by the prime mover. The oil pump includes a case to which the sun gear of the first planetary gear unit is connected. Friction elements are arranged to selectively engage and disengage rotation members of the first planetary gear unit and the speed change unit for achieving a desired speed position. A direct clutch is arranged to directly transmit the rotation from the prime mover to the speed change unit.

Abstract: A single pinion type planetary gear unit and a double sun gear type planetary gear units are coaxially arranged on different positions of a given axis of an input shaft. First and second brakes are coaxially arranged on different positions of the given axis. The first brake selectively fixes a carrier of the double sun gear type planetary gear unit and the second brake selectively fixes an outer one of the sun gears of the double sun gear type planetary gear unit. First and second clutches are coaxially arranged on different positions of the given axis to transmit a speed changed rotation to rotational elements of the two planetary gear unit to provide an associated automatic transmission with a desired speed. The first clutch transmits the speed changed rotation to the ring gear of the single pinion type planetary gear unit, and the second clutch transmits the speed changed rotation to the sun gear of the single pinion type planetary gear unit.

Abstract: A first planetary gear unit is arranged to output a reduced speed rotation upon receiving a rotation from a prime mover. A speed change unit is arranged to which the reduced speed rotation is applied from the first planetary gear unit. The speed change unit is arranged at an opposite position of the prime mover with respect to the first planetary gear unit. An oil pump is arranged between the first planetary gear unit and the prime mover and driven by the prime mover. The oil pump includes a case to which the sun gear of the first planetary gear unit is connected. Friction elements are arranged to selectively engage and disengage rotation members of the first planetary gear unit and the speed change unit for achieving a desired speed position. A direct clutch is arranged to directly transmit the rotation from the prime mover to the speed change unit.