What is the reason for the jitter when Dongfeng Nissan Bluebird manually blocks the cold car?

The reason why Bluebird shakes when manually blocking the cold car is that the first gear and the second gear of the cold car are semi-linked. The more the throttle shakes, the throttle will not shake after the clutch is completely released. After running for several kilometers, the temperature rose, so it didn't shake. Jitter is because the gear is high and the speed is low, and it will be forced to close soon. It is possible that the clutch didn't step on the bottom. Frustration is due to lower gears and higher speed. At this time, if the clutch is released, the car will stumble forward. If it is a manual shift, the starting jitter may be caused by the following reasons: 1. The vibration of the engine may be caused by poor engine operation. Check the spark plug after cleaning the oil circuit. It is recommended to inspect and replace the damaged engine feet. Clutch jitter feeling If you feel the clutch pedal jitter, it may be that the clutch pressure plate is not good. It is recommended to check and replace. If the automatic transmission causes this problem, it may be that the oil in the automatic transmission is dirty. Engine jitter indicates that the throttle valve with dirty oil circuit is dirty and the spark plug is not good. It is recommended to check whether the engine and gearbox feet are damaged.