| 摘要 |
A multi-stage planetary gear train has an upper-side and lower-side planetary gear sets. The upper-side set comprises a first sun gear, a first ring gear, a first outer pinion meshed with the first ring gear, a first inner pinion meshed with the first outer pinion and the first sun gear, and a first carrier rotatably supporting the first and second pinions. The lower-side planetary set comprises a first member, a second member, a third member, and a fourth member that are rotatable. The first sun gear is connected with the input shaft, the first member being connected with the first ring gear at forward 1st speed, the second member being held to said transmission case by connection with the first carrier at the forward 1st speed and a reverse position and connected with the input shaft at forward speed higher than 3rd speed, the third member being held to the transmission case by connection with the first carrier at forward 2nd speed and connected with the first ring gear at forward 3rd speed, the fourth member being connected with the output shaft.
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