Abstract: Power transmission for motor-driven vehicles which comprises an input shaft and an output shaft rotatable about a common axis; a gear mechanism including a first planetary gear set having a first sun gear rotatably supported about said common axis, a first ring gear co-axial with and rotatable about said first sun gear and first planetary gear means including first planetary gears engaging the first sun gear and the first ring gear and a first planetary carrier supporting said first planetary gears and rotatable about said common axis; a second planetary gear set having a second sun gear rotatably supported about said common axis, a second ring gear co-axial with and rotatable about said second sun gear and connected with said first sun gear and second planetary gear means including second planetary gears engaging the second sun gear and the second ring gear and a second planetary carrier rotatably supporting said second planetary gears, said second planetary carrier being connected with the first planetary c

Abstract: Power transmission for motor vehicles including an input and an output shafts rotatable about a common axis, a planetary gear mechanism including interconnected three planetary gear sets, clutch means for selectively connecting elements of the gear mechanism with the input shaft, an element of the final stage gear set of the planetary gear mechanism being connected with the output shaft, brake means being provided for selectively constraining elements of the gear mechanism against rotation. A further set of planetary gear may be additionally combined with the planetary gear mechanism.