Possible causes of automatic transmission jerking on Volkswagen:

Mechanical problems:

* Valve unit malfunction: The valve body is responsible for shifting gears, and a malfunction can cause jerking.
* Worn friction plates: Friction plates transfer power from the engine to the transmission, and wear on them can cause slipping and jerking.
*Lack of transmission fluid: Low fluid levels can cause pressure leaks and jerking.
* Contaminated transmission fluid: Dirty or old fluid can make the valve body and friction discs difficult to operate.
*Faulty Speed ​​Sensor: A faulty sensor can send inaccurate signals to the Transmission Control Module (TCM), causing incorrect shifts.

Electrical problems:

* Failure Solenoids: Solenoids control the flow of transmission fluid and failure can cause jerking.
* Malfunctioning TCM: The TCM is the electronic control unit that is responsible for controlling the transmission, and a malfunction can result in improper shifting.
*Wiring Issues: Damaged or worn wiring can disrupt communication between transmission components.

Software problems:

* Outdated TCM Software: Software updates can improve transmission performance and eliminate jerking.

Other possible reasons:

*Dirty Fuel Filter: A dirty fuel filter can affect engine and transmission performance.
* Engine Trouble: Engine problems can affect transmission performance, causing jerking.

Solution:

* Start by checking the transmission fluid level and condition.
* Perform troubleshooting using a scan tool to identify any trouble codes or sensor problems.
* If necessary, replace faulty components such as valve body, friction discs or solenoids.
*Update TCM software according to manufacturer’s recommendations.
* Solve any problems with the engine or fuel filter.
*Consult a qualified mechanic for further diagnosis and repair.

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