The gearboxes were based on the previous SR1900 series and shared the same number of gears and gear change pattern. The SR2400 series gearbox was discontinued and replaced with the now same model shared across the entire FH and FM range. Torque increases from 1900 Nm to 2500 Nm were due to changes to the machining of the gears as well as the use of the new type of narrower synchromesh mechanism allowing increased gear width. The single control housing and the synchro-mechanism reduced the gearchange effort by about 50%. The control housing was also identical for left and right-hand drive versions reducing overall production cost and assembly.