Abstract: A motor/gear-train drive unit, and particularly a motor-vehicle power-window drive or the like, which can be manufactured and assembled at low cost, and which comprises a motor frame (1) enclosed in the circumferential direction and an adjacent gear case (2) at one of its axial ends and a closing bearing cap (3) at its other axial end, can be obtained by making the bearing cap (3) with a brush support plate (5) mounted therein and bonded therewith. Plug pins (41, 42) extend outwardly through the bearing cap (3). The preassembled subassembly that is axially displaceable, tightly sealed (seal ring [7]), relative to the motor frame (1) and can be secured in a given final operating position to the motor frame (1).