Abstract: Multistage automatic planetary transmission gearing, particularly suitable for passenger cars, using for improvement of conditions in the course of gear changes a mechanism of feedback coupling, comprising an output part, a regulating part and a rest stop.

Abstract: A multistage automatic countershaft transmission adapted for mutually independently shifting the first and second phases of the gears of a transmission to thereby effectuate a smooth gear change within a narrower range of speeds. The countershaft transmission gear is provided with a driving gear which is rotatably supported on a hub, connected to the drum of a gear change clutch, and in engagement with an idle gear supported on a countershaft upon which a countershaft wheel is fixed. The hub and the driven gear are firmly connected and rotatably supported on an output shaft. A carrier of shoes of a gear change clutch is fixed to the hub, the shoes being provided with one or more carrier elements and by means of the carrier elements engage a regulating carrier which is fixed to the output shaft and is provided with an engagement edge, a driving edge, and a rest surface.