a pneumatic shifting force assistance device for a manual transmission is provided , comprising a housing structure having a compressed air inlet , ventilation , control rod , and an output unit comprising a working piston defining two pneumatic working chambers . a valve arrangement is provided between the control rod and output unit , bringing about a pneumatic sequential control from the outlet unit to the control rod by acting on the working chambers . the valve arrangement comprises two piston structures , two annular sealing edges , two valve slides which interact with the sealing edges , and two valve seats . at least one piston structure / valve slide pair is paired with a throttle device such that a throttle seal arranged on the output unit interacts with a throttle passage arranged on the corresponding valve slide or piston structure , where the effective cross - sectional area of the throttle passage depends on the position of the component within the throttle passage .