Patent ID: 8677860

Claim:
A transmission comprising a main input shaft into which driving force of an engine is inputted, a first auxiliary input shaft disposed coaxially with the main input shaft and selectively connected to the main input shaft via a first clutch, a second auxiliary input shaft disposed in parallel to the main input shaft and selectively connected to the main input shaft via a second clutch, an output shaft disposed in parallel to the main input shaft and transmitting the driving force to a driven wheel, an idle shaft disposed in parallel to the main input shaft and supporting a reverse idle gear, a first gear group comprising a plurality of gears disposed on the first auxiliary input shaft and selectively connected to the first auxiliary input shaft via a synchronizing device, a second gear group comprising a plurality of gears disposed on the second auxiliary input shaft and selectively connected to the second auxiliary input shaft via a synchronizing device, and a third gear group comprising a plurality of gears connected to the output shaft and meshing with the gears of the first gear group and the gears of the second gear group, the gears of the third gear group being used in common by the gears of the first gear group and the gears of the second gear group, and an idle gear for transmitting the driving force from the main input shaft to the second auxiliary input shaft being supported on the idle shaft, and the reverse idle gear supported on the idle shaft directly meshes with one of the plurality of gears of the third gear group.