Abstract: A hydrokinetic torque transmitting mechanism having a torque converter and a compound planetary gear system in which the elements of the gear system are stacked in radial disposition, one with respect to the other, to form a multiple ratio torque delivery path with minimum axial dimensions.

Abstract: A hydrokinetic, multiple-ratio, automatic transmission having a hydrokinetic unit and compound planetary gearing wherein the gearing elements are arranged in radial disposition, one with respect to the other, to produce a minimum axial transmission dimension, a clutch-and-brake arrangement that can be controlled to produce four forward-driving ratios and a single reverse ratio, the third forward-driving ratio being a split torque drive and the fourth forward-driving ratio being an overdrive, the gearing including two sets of planet pinions that are mounted independently on their respective carriers and clutch structure for connecting the carriers for common rotation during low speed operation and reverse drive operation and for relative motion during operation in the other ratios.