| 摘要 |
A vehicular transmission is provided with an improved rotary countershaft assembly (100) that eliminates the prior art practice of securing countershaft gears (10) and (12) to adjacent sections (S1) and (S2) of a countershaft (2) by separate keys (14) and (22) disposed in separate grooves (16) and (19) respectively by a singular key (26) disposed in a groove (16) and whose radial thickness is adapted to enable countershaft gear (12) to rotate countershaft (2) in the absence of groove (19).
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