Hydrokinetic-mechanical gearbox for motor vehicles

In a hydrokinetic-mechanical gearbox for motor vehicles in which a hydrokinetic torque converter, a front-mounted planetary wheel system and a Simpson-type planetary gear system are arranged in a transmission housing, the first planetary wheel system is connected in such a way that the turbine shaft (36) is drive-connected to the planet carrier (68), the sun gear (70) is connected to the brake drum (56) by way of a connecting part (72), which drum is gripped by a brake band (57), and the ring gear (74) of the first system is directly drive-connected to the centre shaft (76) and a first override clutch (OWC1) locking in the drive direction is inserted between an inner race (69) on the planet carrier (68) and a shoulder of the centre shaft (76), which clutch in normal operation locks the planet wheel system (66), and a first clutch (64/CL1) is arranged between the brake drum (56) and the planet carrier (68), by way of which clutch a connection transmitting torque in both directions of rotation can be established between the planet carrier (68) and the sun gear (70), and the brake band (57) gripping the brake drum forms a first brake (B1), by means of which the sun gear can be fixed in preparation in a reduced overdrive, the hydrokinetic torque converter is provided with a converter lockup clutch, the two reversible pressure medium circuits of which run axially right through the area of the override clutch of the reactor.