Abstract: In a shifting system (2) for a vehicle transmission which comprises a shifting shaft (6), at least one gear change hub (18) is movably placed in a transmission housing (4) upon the shifting shaft (6). The shifting shaft (6) has at least one shifting pin (30) which with the shifting shaft (6) is rotatable around an axis of rotation (12) and which with the shifting shaft (6) is movable along the axis of rotation (12). Depending on the position of rotation of the shifting shaft (6), the shifting shaft (6) moves with the shifting pin (30) the gear change hub (18). The shifting pin (30), which upon shifting moves the selected gear change hub (18), is placed outside the gear change hub (18) and engages in a bracket (46) connected with the gear change hub (18) and projects from the gear change hub (18). On the outer surface, the gear change hub (18) has one slot (34) in which a locking device (36, 38, 42) is slidingly placed.

Abstract: In a shifting system (2) for a vehicle transmission which comprises a shifting shaft (6), at least one gear change hub (18) is movably placed in a transmission housing (4) upon the shifting shaft (6). The shifting shaft (6) has at least one shifting pin (30) which with the shifting shaft (6) is rotatable around an axis of rotation (12) and which with the shifting shaft (6) is movable along the axis of rotation (12). Depending on the position of rotation of the shifting shaft (6), the shifting shaft (6) moves with the shifting pin (30) the gear change hub (18). The shifting pin (30), which upon shifting moves the selected gear change hub (18), is placed outside the gear change hub (18) and engages in a bracket (46) connected with the gear change hub (18) and projects from the gear change hub (18). On the outer surface, the gear change hub (18) has one slot (34) in which a locking device (36, 38, 42) is slidingly placed.

Abstract: In a pressure-control device for affecting the closing behavior of powershift clutches (K.sub.1 -K.sub.X) in a powershift transmission, a regulating valve (1) cooperates with a damping device (2) as pressure-control valve. Chokes (4, 40, 400) for a more or less smooth connection are arranged in combination with pressure lines (P.sub.S, P.sub.R) over the pressure cycle when the clutch concerned (K.sub.1 -K.sub.X) is engaged. The travel of the damper piston (21) in a direction toward the regulating valve (1) is shortened by a pressurizing piston device (3) cooperating with the piston (21) of the damping device (2). Thus the time for the slipping phase in the engaged clutch concerned is shortened and, together with a higher initial pressure after the clutch is filled, the friction is limited.The limitation of the friction can also be obtained by adding a second choke in parallel in the control pressure line (Pr) by which the choked cross section is increased.