| 摘要 |
In an automatic transmission, the vehicle motion can be started forward or backward, in which vehicle running suitable for a slippery road can be achieved automatically. For this purpose, a drive wheel spin detector is provided to detect whether the drive wheel is spinning. A sub-clutch is provided to engage one of the gear trains, other than the first-speed and reverse gear trains. A controller is provided to connect the sub-clutch when a shift position is in a first-speed or a reverse position and when the drive wheel spin detector detects that the drive wheel is spinning.
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