shifting fork shaft

例句：

1. 1. The car's engine is experiencing some shifting issues, which could be caused by worn out parts.
   这辆车的发动机出现了一些换向问题，可能是由于磨损部件导致的。
2. 2. The engineer inspected the shifting fork shaft and found that it was slightly damaged.
   工程师检查了换向曲轴轴颈，发现它稍微受损了。
3. 3. The mechanic replaced the shifting fork shaft with a new one to fix the vehicle's problem.
   机械师用一个新的换向曲轴轴颈替换了有问题的轴颈，解决了车辆的问题。