1. What is the phenomenon of the car sometimes being smooth and sometimes jerky?

While operating your car, you may encounter a situation where the car runs unstable, sometimes smooth, sometimes jerky. This not only causes discomfort while driving but also poses a risk of serious damage if not resolved promptly.

2. Causes of Vehicle Shocks When Operating

Gearbox Problem

The gearbox plays an important role in transmission and adjusting vehicle speed. When the transmission has problems, the vehicle will not be able to maintain a smooth gear change, leading to jerking.

Low or poor quality gear oil: When the transmission oil is insufficient or has degraded, its lubrication and cooling ability is reduced, causing the gears to rub strongly and create a jerking feeling.

Worn gearbox: Over time, the parts in the transmission can wear out, leading to uneven engagement and making the vehicle shift less smoothly.

Error in the gearbox control system: For automatic transmission vehicles, if the control system has problems, gear shifting may be delayed or performed incorrectly.

Faulty Fuel System

Clogged fuel injectors: When fuel is not sprayed evenly and sufficiently into the combustion chamber, the engine will operate unstable, causing the vehicle to jerk.

Fuel pump not working properly: The fuel flow supplied to the engine is unstable, causing the vehicle to not operate smoothly.

Air Filter Clogged

The air filter helps supply clean air into the engine. When the air filter is clogged, the amount of air entering the engine is reduced, affecting the fuel combustion process and leading to vehicle jerking.

3. How to Fix Vehicle Jerking

Periodically Check and Maintain Gearboxes

Change gearbox oil periodically: Use high quality gear oil such as CVT RED or CVT GOLD, helps maintain smooth shifting and protects the transmission from wear.

Check gearbox oil level: Make sure the oil is always at the recommended level for best system performance.

Maintenance of the gearbox control system: Check and promptly repair sensors and controllers to avoid gear shifting errors.

Clean and Replace Air Filter

Check engine air filter: If you see that the air filter is dirty, clean it or replace it to ensure the amount of air entering the engine is always stable.

Fuel System Maintenance

Clean fuel injectors: Ensure fuel is sprayed evenly and accurately into the combustion chamber.

Check fuel pump: Make sure the pump works well, providing enough fuel for the engine.

4. Tips to Keep the Gearbox Durable

Drive properly: Avoid sudden acceleration or sudden braking to reduce pressure on the transmission.

Do not abuse P and N numbers: When stopping at a red light, keep the car in D gear and apply the brakes lightly to avoid transmission wear and tear.

Use the correct gear oil: Products such as Gartz 6HP, 9G-HP Not only is it suitable for many popular vehicles, but it also helps protect the gearbox in all operating conditions.

5. Conclusion

The phenomenon of the car sometimes running smoothly and jerky can come from many different causes, but the most common is still a problem with the gearbox. To ensure the vehicle always operates smoothly and prolongs the life of the gearbox, regularly check and maintain it periodically. If you are looking for quality gear oil products, Gartz is a reliable choice that gives you peace of mind on every road.