1. Oil spill
Oil oozes out of the gearbox housing or the oil pan, one reason is due to aging of the seal and poor sealing; another reason is that the manufacturing process is poor and the housing has trachoma.
2. Engine stalled, no reaction, shock
The test entry standard is to start the engine, idle, step on the brakes, and enter the gear. The normal situation is that there is a feeling of entering the gear in the period of 1-1.2 seconds, releasing the brake pedal, and the vehicle will not be stepped on the accelerator pedal. Slowly start and gradually extract the speed to 10-20 km / h. This is a normal entry standard. If the entry delay is more than 2 seconds after entering the file, this situation needs immediate maintenance; The gear has a strong impact feeling, that is, the positioning impact shock. It should be noted that any automatic gearbox has a certain degree of impact feeling when entering the gear. If there is no feeling at all, it means that there is a fault inside, but the impact is relatively large. It is unacceptable, and the problem caused by this is complicated, including many aspects except the gearbox. The case of entering the dead fire is that the engine will die when entering the gear. This problem is more obvious when it is cold, which causes this problem. The problem with the gearbox also has problems with other body systems.
3. When D or R is hung, the engine may be turned off. This may be caused by damage to the lock solenoid or by the lock control valve.
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Hang the D or R gear, then release the brakes and the vehicle does not move. Or the car can travel a short distance after the cold car starts, but the car can’t drive under the hot car state. This is often caused by damage to the input shaft or reverse clutch or damage to the D/R brake. It may also be that the automatic transmission has serious oil leakage and is seriously deficient in oil; the connecting rod or cable between the shift lever and the manual valve rocker arm is loose, and the manual valve is kept in the neutral or parking position;
4. The oil filter is blocked; the main oil circuit is seriously leaked; the oil pump is damaged.
The shifting and rushing of the vehicle during the driving process is also a common fault phenomenon of the automatic transmission. This may be caused by the valve body being stuck due to the dirty gear oil.
5. The gearbox slips and accelerates; the gearbox enters the water
During the driving process of the car, there is a sound of engine idling during the speed increase of the fueling valve. The speed of the car is not improved, and the whole car is weak. This phenomenon is mostly caused by the burning of the clutch plate. The gearbox is flooded by external causes, causing the gearbox to malfunction. This may be due to oil in the tank or water entering from the venting cap of the gearbox.
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