| 摘要 |
An input shaft 10 is connected rotationally with a first countershaft 40 through a second main drive gear GM 2 V and a second main driven gear GM 2 N, and a second countershaft 50 is provided externally, coaxially and rotatably with respect to the first countershaft 40 . A first main drive gear GM 1 V which is provided on the input shaft 10 , always meshes with a first main driven gear GM 1 N, which is provided rotatably over the second countershaft 50 . A fourth, sixth and seventh speed drive gear G 467 V, which is provided rotatably over the input shaft 10 , always meshes both with a fourth speed drive gear G 4 V, which is provided rotatably over the second countershaft 50 , and with a fourth, fifth, sixth and seventh speed driven gear G 4567 N, which is provided on the output shaft 60.
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