FIELD: machine building.;SUBSTANCE: five gears are installed at the layshaft of a gearbox, three of them are fixed. A three-position shift collar of the layshaft is installed between two freely mounted gears engaged with the gears fixed at the input shaft, the input shaft bearing is set in the tubular end where a gear is freely mounted and the three-position shift collar is located. The three-position shift collar is located between freely mounted gears.;EFFECT: expanded performance and layout characteristics of a vehicle due to self-regulation and increased range of a gearbox at the transfer of the bearing from the input shaft end to the output shaft end, smaller dimensions and weight per one pair of gears due to the introduction of a splitter, better GB durability due to increased rigidity of shafts at their shorter length.;2 dwg
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