System arranged for control of a time derivative Ṫq fw for a dynamic torque, which is provided to an output shaft from an engine in a vehicle driven with a driving gear activated in a gearbox comprising: - a first determining unit, arranged for the determination of a current speed difference Δω pres between a first end of a powertrain in said vehicle, which rotates with an engine speed ω e, and a second end of said powertrain, which rotates with a rotational speed of at least one driving wheel ω wheel converted with the gear ratio i between the engine and the driving wheel; - a torque control unit, arranged to carry out a control of said engine speed ω e, wherein said control of said engine speed ω e is carried out in such a manner that said current speed difference Δω pres is controlled towards a desired speed difference Δω des between said engine speed ω e and said rotational speed of said at least one driving wheel ω wheel converted with the gear ratio i between the engine and the driving wheel; and - a clutch control unit, arranged to carry out a control of a clutch, characterised in that the control unit is arranged to control the clutch from an initial temporary open clutch position C open, before a time for a shift operation t gear _ shift which is arranged to occur when a rotational speed of an input shaft ω gear_in is substantially equal to the wheel speed ω wheel converted with gear ratios between the wheels and the input shaft, towards a clutch position C closed, for which a rotational speed of an input shaft in said gearbox ω gear_in and said engine speed ω e are substantially equal, wherein said clutch position C closed is reached substantially when said current speed difference Δω pres reaches said desired speed difference Δ ω des, and wherein the desired speed difference Δω des is proportionate to a desired value for the time derivative Ṫq fw_des for said dynamic torque, arranged to be used for further control of the time derivative Tq fw for the dynamic torque. - a first determining unit, arranged for the determination of a current speed difference Δω pres between a first end of a powertrain in said vehicle, which rotates with an engine speed ω e, and a second end of said powertrain, which rotates with a rotational speed of at least one driving wheel ω wheel converted with the gear ratio i between the engine and the driving wheel; - a torque control unit, arranged to carry out a control of said engine speed ω e, wherein said control of said engine speed ω e is carried out in such a manner that said current speed difference Δω pres is controlled towards a desired speed difference Δω des between said engine speed ω e and said rotational speed of said at least one driving wheel ω wheel converted with the gear ratio i between the engine and the driving wheel; and - a clutch control unit, arranged to carry out a control of a clutch, characterised in that the control unit is arranged to control the clutch from an initial temporary open clutch position C open, before a time for a shift operation t gear _ shift which is arranged to occur when a rotational speed of an input shaft ω gear_in is substantially equal to the wheel speed ω wheel converted with gear ratios between the wheels and the input shaft, towards a clutch position C closed, for which a rotational speed of an input shaft in said gearbox ω gear_in and said engine speed ω e are substantially equal, wherein said clutch position C closed is reached substantially when said current speed difference Δω pres reaches said desired speed difference Δ ω des, and wherein the desired speed difference Δω des is proportionate to a desired value for the time derivative Ṫq fw_des for said dynamic torque, arranged to be used for further control of the time derivative Tq fw for the dynamic torque.