| 摘要 |
In a planetary geartrain for automotive transmissions, this invention improves a fuel economy by reducing drag resistance caused from non-operating friction elements in the high speed cruising. In the planetary geartrain composed of planetary gear sets and friction elements, this invention enables a A member fixed to a case in the forward first and the reverse position to be connected selectively to the case or an input shaft through series of a multiplate clutch assembly and a dog clutch.
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