自动变速器个别挡有换挡冲击，除了部分车型稍微松一点节气门拉锁即可排除故障，大部分情况下需要分解检查变速器的控制阀和蓄压器。做这些修理时，不用拆下变速器，只需拆下变速器油底壳，然后拆下控制阀和蓄压器活塞，进行检修即可。全部维修过程只需2h，而且成功率非常高。

Individual gears of automatic transmissions may experience shifting impacts. Except for some models where the throttle lock can be slightly loosened to troubleshoot, in most cases, it is necessary to disassemble and inspect the control valve and accumulator of the transmission. When doing these repairs, there is no need to remove the transmission. Simply remove the transmission oil pan, then remove the control valve and accumulator piston for maintenance. The entire repair process only takes 2 hours and the success rate is very high.

个别挡有换挡冲击，维修人员为什么要重点检查控制阀中的滑阀和蓄压器内的活塞是否发生卡滞？

Why do maintenance personnel focus on checking whether the slide valve in the control valve and the piston in the accumulator are stuck when there is shifting impact in individual gears?

使用中的自动变速器个别挡有换挡冲击，常见的故障是：

The automatic transmission in use may experience shifting shock in certain gears, and the common faults are:

一、控制阀中换挡阀发生轻微卡滞

1、 Slight jamming of the shift valve in the control valve

（1）1-2换挡阀发生轻微卡滞会造成1挡升2挡时发生严重换挡冲击。

(1) Slight jamming of the 1-2 shift valve can cause severe shifting shock when shifting from 1st gear to 2nd gear.

（2）2-3换挡阀发生轻微卡滞会造成2挡升3挡时发生严重的换挡冲击。

(2) Slight jamming of the 2-3 shift valve can cause severe shifting shock when shifting from 2nd to 3rd gear.

（3）3-4换挡阀发生轻微卡滞会造成3挡升4挡时发生严重的换挡冲击。

(3) Slight jamming of the 3-4 shift valve can cause severe shifting shock when shifting from 3rd to 4th gear.

二、控制阀中手动挡调压阀发生卡滞会造成挂手动挡时发生严重的换挡冲击

2、 The jamming of the manual pressure regulating valve in the control valve can cause serious shifting impact when shifting to manual mode

（1）低速挡调压阀发生卡滞会造成手动1挡换发生严重的换挡冲击。

(1) A stuck low-speed pressure regulating valve can cause severe shifting impact during manual first gear shifting.

（2）第二滑行调压阀发生卡滞会造成手动2挡换发生严重的换挡冲击。

(2) The jamming of the second sliding pressure regulating valve can cause serious shifting impact during manual second gear shifting.

三、控制阀中蓄压器调节阀发生卡滞

3、 The regulating valve of the accumulator in the control valve is stuck

变速器在“D”位换挡时，蓄压器调节阀发生卡滞，蓄压器的背压油无法泄入油底壳。

When the transmission shifts in the "D" position, the regulating valve of the accumulator becomes stuck, and the back pressure oil of the accumulator cannot leak into the oil pan.

使蓄压器在换挡时临时转移一部分油，防止换挡冲击功能丧失，会造成蓄压器负责的挡发生严重的换挡冲击

Temporarily transferring a portion of oil from the accumulator during gear shifting to prevent loss of shifting shock function, which can cause severe shifting shock in the gear responsible for the accumulator

四、蓄压器活塞发生卡滞

4、 The accumulator piston is stuck

蓄压器活塞发生卡滞后，换挡时像蓄压器内临时转移一部分油的任务无法完成，会使该蓄压器造成所负责挡位的离合器和制动器接合速度过快，导致发生严重的换挡冲击

The piston of the accumulator is stuck and lagging, and the task of temporarily transferring a portion of oil inside the accumulator cannot be completed during shifting, which can cause the accumulator to engage the clutch and brake of the responsible gear too quickly, resulting in serious shifting impact

上述故障集中在控制阀和蓄压器内，所以，使用中的自动变速器个别挡有换挡冲击时，维修人员要重点检查控制阀中的滑阀和蓄压器内的活塞是否发生卡滞。

The above faults are concentrated in the control valve and accumulator. Therefore, when there is shifting impact in individual gears of the automatic transmission in use, maintenance personnel should focus on checking whether the slide valve in the control valve and the piston in the accumulator are stuck.

用手逐个轻轻地往下按蓄压器内的活塞，检查有无卡滞，回位是否迅速，如发现某个蓄压器内的活塞发生卡滞，全部蓄压器的活塞都需要拆下清洗。可用100kPa的压缩空气将卡滞的活塞顶出，操作时要用手指压住活塞，以防止活塞快速飞出伤人。

Gently press the pistons inside the accumulator one by one with your hand to check for any jamming and whether they return quickly. If any piston in the accumulator is found to be stuck, all pistons in the accumulator need to be removed and cleaned. Compressed air of 100kPa can be used to push out the stuck piston. During operation, press the piston with your fingers to prevent it from flying out quickly and injuring people.

为了保障广大车主的行车安全，各位在平常行车中一定要正确使用车辆，一旦车子出现问题一定要及时送往专业维修公司进行检查维修，以免造成大患！

In order to ensure the safety of car owners, it is essential to use the vehicle correctly during normal driving. If there are any problems with the vehicle, it is important to promptly send it to a professional repair company for inspection and repair to avoid causing serious problems!

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This article is dedicated by Jinan Automatic Transmission Maintenance Friendship. For more related knowledge, please click: http://www.jnbsx.com Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned