What should I do if there is something wrong with the car gearbox?

As we all know, gearbox is one of the main components of automobile transmission system, and its cost is relatively high. In the event of failure or damage, a lot of maintenance costs are needed. Therefore, in daily use, we should always pay attention to some faults of the gearbox to prevent the gearbox from failing, which costs a lot of money. Next, we will introduce some common problems.

1 transmission slip

Fault performance: If you hear the sound of engine idling while driving (such as the feeling of stepping on the accelerator when the gear is in P or N gear), there is no obvious speed increase because there are few cars; In another case, the uphill is weak, and the engine speed is very fast, but it is normal to drive on a flat road.

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

Operation: Stop at the roadside and wait for rescue. Don't continue the operation, so as not to cause too many serious losses.

2 gearbox retrogression

Fault manifestations: When driving, the gearbox has a strong sense of vibration, impact and frustration when upshifting, and it is also possible that the gearbox will feel stuck and shrug when accelerating rapidly.

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

Operation: Stop at the roadside and wait for rescue. Don't continue the operation, so as not to cause too many serious losses.

3 transmission oil leakage

Fault: It is more difficult to start the car than usual. Even if you step on the accelerator to increase the speed during driving, the car has no obvious signs of acceleration.

Cause of failure: Oil leakage leads to insufficient lubrication effect in the gearbox, which increases the friction between gears and leads to gearbox failure.

Operation: Go to 4S shop to check and add gearbox oil to make gearbox gear oil have better roller skating effect.

4 Abnormal sound of gearbox

Cause of failure: Under high temperature for a long time, the lubrication performance and oil wear resistance of the gearbox will decrease, the bearings and gears in the gearbox will be damaged, or the wheel edges will be worn.

Operation: Before operation, contact the after-sales staff of 4S shop and listen to their opinions.

5 The gearbox temperature is too high.

Fault manifestations: the computer alarms that the gearbox temperature is too high while driving; After driving for a while, I felt that the temperature of the gearbox was too high.

Cause of failure: when the gearbox is running under high load, the temperature can not be effectively controlled; Or the gearbox slips and the gearbox temperature is too high. On some dual-clutch gearboxes, when the vehicle crawls at low speed, the friction of clutch plates causes the gearbox to overheat.

Operation: just stop for a few minutes. If the situation is serious, go to the 4S shop for inspection and maintenance.

6 After the gear is engaged, the engine stops.