What Causes Jerking in Automatic Transmission Cars?

[NorahLynn]

Common causes of jerking in automatic transmission cars are as follows: Engine Power Supply System: Spark plugs and ignition coils: If high-voltage sparking is poor, it can lead to intermittent engine malfunction. Engine Fuel Supply System: Fuel injectors: If the fuel injectors have carbon deposits, minor blockages, or poor atomization, it can easily cause irregular fuel injection. Transmission Issues: If the transmission experiences impacts, jerking, or gear slipping, it is usually due to a damaged valve body or dirty transmission fluid with internal impurities. Especially when dirt and impurities accumulate and block the passages inside the valve body, it can prevent effective regulation of oil pressure, leading to jerking, impact, or slipping. Damaged Engine Mounts: Damaged engine mounts or transmission mounts fail to provide cushioning when releasing the throttle, resulting in jerking. Excessive Carbon Deposits in the Throttle Body: If the throttle body is not cleaned for a long time, excessive carbon deposits can alter the throttle opening angle, causing jerking when releasing the throttle.