Abstract: The invention relates to a method of detecting a change in the direction of rotation of a rotatable shaft (5) based on non-direction sensitive rotational speed data, the method comprising the steps: ?determining a speed (17) of a rotatable shaft (5) of a vehicle transmission (3) based on non-direction sensitive speed data received from a non-direction sensitive rotational speed sensor (7), wherein the speed (17) of the rotatable shaft (5) is the absolute value of the rotational speed of the rotatable shaft (5); ?determining, based on the speed (17) of the rotatable shaft (5), if the duration of a first continuous time interval (20) during which the speed (17) of the rotatable shaft (5) is continually smaller than a first predetermined speed value (18) is shorter than a predetermined duration (24); and ?detecting that a change in the direction of rotation of the rotatable shaft (5) has occurred during the first continuous time interval (20) if the duration of the first continuous time interval (20) is shorter