What are the symptoms of transmission failure? What are the symptoms of transmission failure?

The location of the transmission fault varies according to the location, as follows:

1. The gearbox is slipping

Fault performance: During driving, when the throttle is refueled, you can hear the engine idling (similar to the feeling of hanging in P gear or N gear and stepping on the accelerator), but the car has no obvious speed increase and acceleration is weak; The other situation is that the flat road driving is basically normal, but the uphill is weak and the engine speed is very high.

Cause of failure: The oil level of the hydraulic oil is too high, and a large number of bubbles are generated after being violently stirred by the planetary row during operation; Clutch or brake pads, brake bands are worn or even burned.

Operation: Stop on the side of the road and wait for rescue, and do not continue to operate to avoid further serious damage.

2. Oil leakage from the gearbox

Fault performance: It can be clearly felt that the car starts more laboriously, and although the speed of the accelerator is increased during driving, the car has no obvious signs of acceleration.

Cause of failure: Oil leakage will lead to insufficient lubrication inside the gearbox, and accelerate the friction between the gears, resulting in the gearbox not working properly.

Operation: Go to the 4S shop in time to check and add transmission oil, so that the transmission gears have better lubrication.

3. The gearbox is frustrated

Fault performance: In the process of driving, the shock, vibration and frustration generated by the gearbox when upshifting are relatively strong or there is a feeling of jamming and shrugging when accelerating sharply.

Cause of failure: Due to the high oil temperature of the automatic transmission, stubborn dirt and impurities appear in the gearbox, which forms a blockage in the valve body, resulting in the poor movement of the solenoid valve, and the oil pressure cannot be adjusted sequentially, resulting in the frustration of the gearbox.

Operation: You should go to the 4S shop for inspection and maintenance in time.

4. Abnormal sound of gearbox

Fault performance: When the car is idling or driving and driving under high load, it hears abnormal noise, even loud noise, and there is no rhythmic and dull sound when switching gears.

Cause of failure: Under long-term high temperature conditions, the anti-wear performance and lubrication performance of the transmission oil are reduced, and the bearings, gears and other components in the gearbox are worn or seriously worn, or the gear side is damaged.

5. The temperature of the gearbox is too high

Fault performance: during driving, the computer alarm shows that the temperature of the gearbox is too high; Or after driving for a while, you feel that the gearbox is overheated, or even hot.

Cause of failure: The temperature cannot be effectively controlled when the gearbox is running under high load; Or a slippage of the gearbox can also make the temperature too high. In addition, on some dual-clutch transmissions, the clutch plates rub and heat up when the vehicle peristalsis at low speeds, causing the transmission to overheat.

Operation: stop on the side of the road and rest for a few minutes to start the vehicle again, if the situation is serious, you should go to the 4S shop for inspection and maintenance.

6. After the gear, the engine turns off

Fault manifestation: After starting the car, when the engine is turned off immediately from the P gear to other gears.

Cause of failure: Damage to the locking solenoid valve, damage to the locking control valve hairpin, or faulty input shaft speed sensor may cause the engine to stall.

Operation: Stop on the side of the road and wait for rescue, and do not continue to operate to avoid further serious damage.

The car shows that the symptoms of transmission failure are:

1. The gearbox fault light is on.

If the fault light on the meter is on, don't panic. Try to turn off the ignition and start it again, and see if it can return to normal. If it can't be restored to normal, or if the shift is shocked, it is usually a real fault of the transmission system. This is when you need to call for help.

2. Slow response.

For transmissions, it is designed that every shift should be quickly shifted to the correct gear. So, when you don't feel smooth or even difficult when changing gears, there must be something wrong with the gearbox. In this case, you should go to the transmission repair shop in time to check and repair.

3. The start is laborious.

If you can clearly feel that the car starts with more effort, although the speed of the accelerator is increased during driving, the car has no obvious signs of acceleration. It may be that there is an oil leak in the gearbox, which can lead to insufficient lubrication inside the gearbox and accelerate the friction between the gears, causing the gearbox to not work properly. At this time, you should go to the 4S shop in time to check and add transmission oil, so that the transmission gear has better lubrication.

4. After the gear, the engine is turned off.

As soon as the car is started, the engine stalls as soon as it is hooked from the P gear to another gear. It may be that the locking solenoid valve is damaged, the locking control valve is damaged or the input shaft speed sensor is faulty, at this time, you should stop on the side of the road and wait for rescue, and do not continue to operate, so as not to cause more serious losses.

Maintenance method. 1. Check the gearbox in time.

It is necessary to check the amount of oil in the gearbox in time to ensure that it is maintained within the specified range, and to fill it in time according to the actual working conditions.

It is necessary to check the working status of the gearbox gears regularly, ensure that the meshing between the gears is in the best state, and clean up in time to ensure that the gears and shafts are perfectly matched.

2. Check the status of different connection parts of the gearbox in time.

In the process of daily maintenance, the status of each connection part of the gearbox should be checked, and whether there are any faults such as looseness, wear and damage, etc., should be found in time. When the connection part is loose, it should be tightened in time, and the damaged position should be repaired and replaced in time. Check whether there is oil leakage and oil seepage between the oil seal and the external joint part of the shaft end face in time, and replace the invalid oil seal and paper pad in time.

1.Oil spills.

There is oil seepage at the gearbox housing or oil pan, one reason is that the seal is aging and poor sealing; Another reason is that the shell has trachoma due to poor manufacturing processes.

2.The gear engine stalls, does not react, and shocks.

The test gear standard is to start the engine, idle, step on the brakes, into gear, the normal situation is that there is a feeling of entering the gear within a second time, let go of the brake pedal, the vehicle will start slowly without stepping on the accelerator pedal and gradually extract to 10-20 kilometers of speed, this is a normal gear standard, if more than 2 seconds after the gear is positioned to delay the gear, this situation needs to be overhauled immediately; If there is a strong impact feeling in the gear, that is, the positioning of the impact of the gear, it should be noted that any automatic transmission has a certain degree of impact in the gear, if there is no feeling at all, it means that there is a fault inside, but the impact is relatively large is unacceptable, and the problem caused by it is very complicated, including many aspects other than the gearbox; The situation of dead fire in gear is that the engine will die when in gear, this problem is more obvious when the car is cold, and the problem is caused by the problem of the gearbox and other body systems.

3.Hooking D or R, the engine stalls This fault may be caused by the locking solenoid valve being damaged or the locking control valve being stuck.

Engage D or R gear, then release the brakes, and the vehicle does not move. Or the car can travel a short distance after starting the car cold, but the car cannot drive in the hot state. This is usually caused by damage to the input shaft or reverse clutch, or damage to the DR brake.

It may also be that the automatic transmission has serious oil leakage and serious oil shortage; The connecting rod or cable between the shift lever and the rocker arm of the manual valve is loosened, and the manual valve remains in neutral or parking position;

4.The oil inlet filter is blocked; Serious leakage of the main oil circuit; The oil pump is damaged.

The impact and impulse of the vehicle shift during driving are also common fault phenomena of automatic transmissions, which may be caused by the excessive dirtiness of the transmission oil, resulting in the stagnation of the valve body.

5.The gearbox slipped, and the acceleration was weak; Water ingress into the gearbox.

During the driving of the car, there is the sound of the engine idling during the accelerator speed up process, the speed of the car does not increase, and the whole car feels weak, which is mostly caused by the burning of the clutch plate. Water ingress into the gearbox due to external causes causes the gearbox to not work properly, which may be due to oil stringing in the tank or water entering from the gearbox vent cap.

6.Abnormal noise. It is the abnormal sound of the bearing, and the abnormal sound of the general bearing is closely related to the speed, and the higher the speed, the more screaming.

It is the abnormal sound of the differential or the main transmission gear, which generally appears at a speed of 50-70 kilometers, because the meshing surface of the gear is different, and the sound is obvious when refueling, and the sound of releasing the throttle is significantly weakened.

It is the abnormal sound of the hydraulic system such as the oil pump, which is closely related to the speed but has nothing to do with the speed, and the scream is caused by the oil pump when the speed is high. It should be noted that the gearbox system works with the engine, chassis and other parts, and many sounds are mixed together, which is not easy to identify. "

Extinguish the power off and reclear the hidden start to try, generally speaking, electronic things are cautious and calling, there will be a certain probability of false alarm, if the power is off and restarted after the wide Kai is good, you can ignore it, if it still doesn't work, then you have to go to 4S to check and repair.

This phenomenon has not been encountered, and it is estimated that it is not easy for masters to encounter it... Since the mountain has been assigned to prompt like this, it must be faulty 4S said that there is nothing wrong, then you ask it, what is the reason for such a suggestion? Can't answer? Change someone who can answer.

There are many manifestations of gearbox failure, as follows: 1. The gearbox fault light is on, if the fault light on the instrument is on, try to turn off the engine and start it again, whether it can be restored to normal, if it cannot be restored to normal or the shift impact, it is generally the real fault of the transmission system, and it is necessary to call for rescue; 2. Slow response, for the gearbox, from the design point of view, every time you change gears, you should quickly change to the correct gear, so when you feel not smooth when you change gears, or even very difficult, it means that there must be a problem with the gearbox, and in this case, you should go to the gearbox repair shop in time to check and repair; 3. The start is laborious, if you can clearly feel that the car starts more laborious, although the speed of the accelerator is increased during driving, but the car has no obvious signs of acceleration, it may be the gearbox oil leakage, the gearbox oil leakage will lead to insufficient lubrication inside the gearbox, and accelerate the friction between the gears, resulting in the gearbox can not work normally, at this time, you should go to the 4S shop in time to check and add the gearbox oil, so that the gears of the gears have better lubrication.

The phenomenon of gearbox failure is that there will be problems such as frustration, abnormal noise, slippage, impact, etc., which need to be repaired in time: 1. The gearbox fails, in many cases, it is not the internal valve body that is damaged, but the stubborn dirt and impurities inside, especially in the valve body, the dirty impurities accumulate to form a blockage, resulting in the inability to achieve effective adjustment of oil pressure, resulting in the occurrence of frustration impact slippage; 2. At the same time, the problem of high temperature of the gearbox can not be ignored, according to the data of the Transmission Repair Association, more than 90% of all faulty gearboxes are caused by overheating; 3. High temperature will destroy the quality and friction characteristics of the gearbox oil, increase friction and wear, and produce noise, and at the same time produce sludge inside the gearbox, resulting in frustration and impact of the gearbox.

The signs of transmission failure are: 1. The automobile transmission failure light is on; 2. Valve body failure; 3. The gearbox does not upshift; 4. Peculiar smell; 5. a jump gear; 6. The trailer does not drive; 7. Oil leakage from the gearbox; 8. The gearbox shifts for a long time. The cause of the failure of the vehicle sensitive Zen transmission is as follows:

1. The temperature of the gearbox is too high; 2. If the gearbox is not replaced for too long, the oil will deteriorate and be disadvantaged; 3. Water inlet into the gearbox; 4. The height error of the oil level is large; 5. The friction plate slips. The functions of the gearbox are: 1. Change the transmission ratio and expand the range of torque and speed of the driving wheel; 2. The rotation direction of the engine remains unchanged, so that the car can drive backwards; 3. Use neutral gear to interrupt the dust transmission of the power axle, which is convenient for the transmission to shift gears or carry out power output; 4. A power take-off can be installed.