What is the fault when the gear shifts from D to N?
2 Answers
The reasons for the gear shifting from D to N are as follows: Transmission oil circuit blockage or poor flow: Worn oil circuit plate, long-term lack of transmission oil change, deterioration, reduced lubrication effect, dirty transmission filter, poor filtration, causing wear particles to enter the valve body. Insufficient or excessive transmission oil: Check if the transmission oil is at the standard level. Too little or too much transmission oil can cause this fault. For vehicles with a transmission oil dipstick, check if the oil level is at the standard mark when the engine is running. Solenoid valve damage: Sludge in the transmission oil circulating and blocking the oil passages in the valve body can cause jerking issues. Over time, this can lead to transmission overheating, impact, slippage, and a series of other transmission problems.
A few days ago while repairing cars, I encountered many owners complaining about the sudden shift from D to N gear. This is usually a fault in the automatic transmission, such as a malfunctioning switch or sensor inside the shift lever, possibly caused by long-term wear and tear. Another common reason is an error in the transmission control unit, which misinterprets gear commands, or wear in internal mechanical components like chains or synchronizers. This kind of gear jumping during driving is particularly dangerous because it causes the vehicle to lose power instantly, especially on highways where it can easily lead to accidents. I recommend turning off the engine immediately and checking if the transmission fluid level is normal, as low fluid can exacerbate the problem. It's best to take the car to a professional repair shop to read the fault codes with a diagnostic computer to determine whether it's a hardware or software issue. Don't delay, as this could lead to more expensive repairs for the entire transmission. Regular maintenance checks of the shifting system can prevent such situations.
