变速箱是汽车动力传递的核心枢纽，一旦出问题，轻则影响驾驶体验，重则直接抛锚在路上。很多车主因为不熟悉故障信号，把小问题拖成大故障，维修费用从几千元变成数万元。以下6个信号一出现，建议立刻停车检查。

The gearbox is the core hub of power transmission in a car. Once there is a problem, it can affect the driving experience or even cause it to break down on the road. Many car owners, due to unfamiliarity with fault signals, drag small problems into major ones, resulting in repair costs ranging from thousands of yuan to tens of thousands of yuan. The following 6 signals must be immediately stopped for inspection.

信号一：换挡顿挫、闯动。 无论是自动挡还是手动挡，正常换挡都应平顺。如果起步挂D挡后轻踩油门，车身突然“往前闯一下”；或者低速升挡时，像被人从后面“拽了一把”；高速降挡时转速突然飙升并伴随车身抖动——这些都是明显故障信号。CVT变速箱顿挫可能是钢带磨损（急加速频繁会加剧），AT变速箱可能是液压阀体堵塞（长期不换油导致），DCT可能是离合器片磨损。济南一位车主早期低速换挡有轻微顿挫没在意，3个月后高速行驶中突然失去动力，钢带断裂，维修花了2.8万。

Signal 1: Shifting jerks and jolts. Whether in automatic or manual mode, normal gear shifting should be smooth. If you lightly step on the accelerator after starting in D gear, the vehicle suddenly "rushes forward"; Or when upshifting at low speeds, it feels like being pulled from behind; When downshifting at high speed, the engine speed suddenly surges and accompanied by body shaking - these are obvious fault signals. CVT gearbox jerking may be due to steel belt wear (exacerbated by frequent rapid acceleration), AT gearbox may be due to hydraulic valve body blockage (caused by long-term lack of oil change), DCT may be due to clutch plate wear. A car owner in Jinan didn't pay attention to the slight jerking when shifting gears at low speeds in the early days. Three months later, while driving at high speeds, he suddenly lost power and the steel belt broke. The repair cost was 28000 yuan.

信号二：加速打滑，转速飙升但车速上不去。 超车时深踩油门，转速从2000转瞬间升到4000转，但车速从60km/h慢慢爬到70km/h，没有推背感。爬坡时转速很高但车速越来越慢。这种故障在高速行驶时出彩危险——超车时需要急加速却因打滑动力上不去，容易被后车追尾。CVT打滑多为钢带/链条磨损，AT多为液力变矩器故障。

Signal 2: Acceleration slip, revs skyrocket but vehicle speed cannot go up. When overtaking, press the accelerator deeply and the RPM instantly increases from 2000 to 4000, but the speed slowly climbs from 60km/h to 70km/h without any sense of acceleration. When climbing, the speed is high but the speed is getting slower and slower. This type of malfunction is extremely dangerous when driving at high speeds - when overtaking, it requires rapid acceleration but the power cannot go up due to slipping, making it easy to be rear ended by the following car. CVT slippage is mostly caused by steel belt/chain wear, while AT is mostly caused by hydraulic torque converter failure.

信号三：挂挡后不动或起步延迟。 挂D挡松开刹车，车子过3-5秒才慢慢动起来（正常应立即动）；挂R挡时车尾没反应，需重新挂挡甚至重启。这种情况多是由于输入轴或倒挡离合器损坏造成。

Signal 3: No movement or delayed start after shifting gears. Release the brake when in D gear, and the car will slowly start moving after 3-5 seconds (normally, it should start immediately); When shifting to R gear, the rear of the car does not respond and needs to be shifted again or even restarted. This situation is often caused by damage to the input shaft or reverse clutch.

信号四：行驶中出现异响。 行驶中变速箱位置传来“咔咔”或“嗡嗡”等异响。空挡时异响消失。这种现象多数是由于零件磨损引起，或者是安装时不到位造成。

Signal 4: Abnormal noise during driving. There is a strange noise such as "clicking" or "buzzing" coming from the position of the gearbox while driving. The abnormal noise disappears when in neutral gear. This phenomenon is mostly caused by component wear or improper installation.

信号五：变速箱漏油。 地面有油渍，变速箱壳体或油底壳处有油渗出。一个原因是密封件老化，另一个是制造工艺不良造成壳体有沙眼。

Signal 5: Transmission oil leakage. There are oil stains on the ground and oil leakage from the gearbox housing or oil pan. One reason is the aging of the sealing components, and the other is the poor manufacturing process causing sand holes in the shell.

信号六：仪表盘亮起故障灯。 齿轮灯或扳手灯亮起。锁挡保护是电脑无法正常控制时启动的失效保护模式，表现为不能换挡。

Signal 6: The dashboard lights up the fault light. The gear light or wrench light is on. Lock protection is a fail safe mode that is activated when the computer cannot control it properly, resulting in the inability to shift gears.

记住：以上明显一个信号出现，立即低速前往专业维修机构检查。 早发现、早检修，小问题花几百块就能解决，拖成大修就是上万。

Remember: If any of the above signals appear, immediately go to a professional maintenance institution at low speed for inspection. Early detection and maintenance can solve small problems for a few hundred yuan, but when it comes to major repairs, it can cost tens of thousands of yuan.

本文由济南自动变速箱维修友情奉献.更多有关的知识请点击:http://www.jnbsx.com我们将用真诚的态度.为您提供为多维度的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

This article is a friendly contribution from Jinan Automatic Transmission Maintenance For more information, please click: http://www.jnbsx.com We will adopt a sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.