Performance of automobile gearbox problems

Performance of automobile gearbox problems

Although the car is a relatively large existence, there are actually many parts on the car. No matter which accessory fails, it may be more serious for the car. Let's take a look at these performances that may indicate gearbox failure.

1, impact when starting or driving

Fault condition: the car has obvious impact when starting, driving or accelerating.

The reasons for this failure may be: the engine idle speed is too high; Improper adjustment of throttle cable or throttle position sensor causes high oil pressure in the main oil circuit; The failure of the main oil pressure regulating valve causes the oil pressure in the main oil circuit to be too high; The shift actuator slips; The oil pressure solenoid valve does not work; There is something wrong with this computer.

2, into the car.

Fault phenomenon: after the car starts, put the D or R gear, release the brake, and the car will not respond and will not move forward. Manual gear shift 1 gear release the clutch and the car will not run.

Cause: It may be that the transmission input shaft or reverse clutch is damaged or the reverse brake is damaged. It may also be caused by oil leakage in the gearbox and a serious shortage of gearbox oil.

3. Engine flameout after gear shifting.

Phenomenon: When the engine is idling, the engine stops when the joystick is changed from P or N to R, D, S and L (or 2, 1). Or when driving in forward gear or reverse gear, press the brake pedal and the engine stops.

Cause of failure: It may be the following four reasons: the engine idle speed is too low; The locking control valve in the valve plate is stuck; The gear switch is faulty; The input shaft speed sensor is faulty.