Patent ID: 7243565

Claim:
A twin-clutch manual transmission comprising: first and second input shafts adapted to selectively receive an engine rotational power through respective clutches, the second input shaft being hollow and rotatably supported on the first input shaft such that the first input shaft protrudes from a rear end of the second input shaft to a position remote from an engine to form a rear end portion; a counter shaft extending parallel to the first and second input shafts; gear sets of one of an odd-numbered gear range group and an even-numbered gear range group disposed between the rear end portion of the first input shaft and the counter shaft to provide power transfer; gear sets of the other of the odd-numbered gear range group and the even-numbered gear range group disposed between the second input shaft and the counter shaft to provide power transfer; an output shaft placed in a concentric and abutting relationship with a rear end of the first input shaft to allow a rotational power, resulting from speed reduction depending on a selected gear range, to be extracted from the output shaft through the counter shaft; and a meshing mechanism disposed on an a butting section between the rear end of the first input shaft and the output shaft, the meshing mechanism operative to provide a direct-coupling gear range in which the first input shaft and the output shaft are directly coupled; wherein the gear range group disposed between the rear end portion of the first input shaft and the counter shaft includes the same gear range group as the odd-numbered gear range group or the even-numbered gear range group to which the direct-coupling gear range belongs, and wherein the rear end portion of the first input shaft and the counter shaft are rotatably supported on a stationary wall of a transmission case at a rotation support section thereof between one gear set disposed on the rearmost area of the rear end portion of the first input shaft and another gear set located on the first input shaft and forward of and adjacent to the one gear set.