AN AUTOMATED MECHANICAL TRANSMISSION FOR A VEHICLE

The invention relates to an automated mechanical transmission (100) for a vehicle (110), comprising:- a main gearbox assembly (MG) comprising a main shaft (1) and being adapted to be shiftable between at least one engaged state and a neutral state;- a split gearbox assembly (SG) comprising an input shaft (2) and being adapted to be shiftable between a first engaged state, a second engaged state and a neutral state;- a countershaft (3);- a crawler gearbox assembly (CG) comprising a crawler gear engagement member (5) which is adapted to selectively engage and disengage a crawler gear defining a torque path from the input shaft (2) to the main gearbox assembly (MG) via the countershaft (3);- a gearbox brake (6); and- a transmission control unit (7);- wherein the transmission is configured to be settable in an AMT neutral state defined by the main gearbox assembly (MG) being in the neutral state, the split gearbox assembly (SG) being in one of the engaged states and the input shaft (2) being in driving connection with a power unit (120) causing the input shaft (2) to rotate when the transmission is in use; wherein:- when the transmission control unit (7) obtains a request to engage the crawler gear from the AMT neutral state, the transmission control unit (7) is configured to:- apply the gearbox brake (6) so that a rotational speed of the countershaft (3) is reduced to a first predetermined rotational speed which is higher than a zero rotational speed; and- when the first predetermined rotational speed is reached, release the gearbox brake (6), set the split gearbox assembly (SG) to the neutral state and engage the crawler gear by the crawler gear engagement member (5). The invention also relates to a method and to a vehicle (110).