How to Solve the Jerking Issue in 4AT Transmission?
2 Answers
Regularly check the automatic transmission fluid level to ensure it is normal: Start the engine and preheat the transmission fluid to around 50°C. The transmission fluid change interval is generally two years or 40,000~60,000 kilometers. It is recommended to change the fluid 2,000~3,000 kilometers in advance. Use specialized transmission fluid exchange equipment to fully circulate the old fluid while the transmission is running, completely drain it, and then add new transmission fluid.
I recently encountered jerking issues with my 4AT transmission and personally solved it by changing the transmission fluid. In older cars, transmission fluid can thicken or accumulate impurities over time, affecting shift smoothness. It's recommended to first check the fluid level and color—if it's cloudy or black, it should be replaced. The DIY steps are simple: buy compatible fluid, lift the vehicle, drain the old fluid, and add new fluid without overfilling. During that fluid change, I also found the filter was clogged, and cleaning it made a noticeable improvement. Remember not to use the wrong fluid type, such as ATF-Dexron III. Jerking is more noticeable during cold starts, likely due to low fluid temperature—warming up the engine for a few minutes before driving can reduce the issue. Long-term neglect can lead to internal wear and expensive repairs, so it's best to set up a maintenance schedule.
