Abstract: A method for temporarily preventing automatic gear shifting in a vehicle, comprising the steps of: preventing gear shifting as long as a traction control system indicates that at least one driven wheel is spinning, calculating a vehicle acceleration, calculating a value of a derivative of the acceleration or a value indicative of a difference between the vehicle acceleration and a previously calculated vehicle acceleration, and preventing gear shifting for a predetermined time, if the value is equal or higher than a predetermined value. A system, a computer program, a computer program product and an electronic control unit for performing the method are also disclosed.

Abstract: A method for determining a vehicle speed, e.g. for an automatic gear shifting system. The method comprises the steps of: determining if at least one driven wheel is spinning or shows a tendency to spin and/or if the vehicle is braked under influence of an antilock braking system, and determining the vehicle speed based on a rate of rotation of at least one non-driven wheel, a value of the vehicle speed received from a positioning system and/or a value of the vehicle speed received from a vehicle radar system, if either the at least one driven wheel is spinning or shows a tendency to spin or the vehicle is braked under influence of the antilock braking system. A vehicle, an electronic control unit, a computer program and a computer program product are also disclosed.

Abstract: A method for temporarily preventing automatic gear shifting in a vehicle, comprising the steps of: preventing gear shifting as long as a traction control system indicates that at least one driven wheel is spinning, calculating a vehicle acceleration, calculating a value of a derivative of the acceleration or a value indicative of a difference between the vehicle acceleration and a previously calculated vehicle acceleration, and preventing gear shifting for a predetermined time, if the value is equal or higher than a predetermined value. A system, a computer program, a computer program product and an electronic control unit for performing the method are also disclosed.