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What Causes the Jerking in the 2021 Bora 6AT Transmission?

2 Answers

Leila

07/24/25 8:04am

Persistent dirt and impurities inside the transmission can cause blockages in the valve body, hindering its smooth up-and-down movement. This disrupts the sequential regulation of oil pressure, leading to issues like gear jerking, impact, and slippage. Wear or severe wear of components such as bearings and gears inside the transmission, or damage to the gear sides, can also contribute to these problems. Additionally, the transmission may fail to effectively control temperature during high-load operation. Automatic Transmission Abnormal Noises: Wear or severe wear of components such as bearings and gears inside the transmission, or damage to the gear sides. Automatic Transmission Overheating: The transmission may fail to effectively control temperature during high-load operation. Simply replacing the ATF (Automatic Transmission Fluid) oil won't solve the issue. Firstly, it cannot remove the persistent dirt and impurities already formed inside the transmission. Secondly, it cannot effectively control the temperature of the ATF oil.

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OLeonardo

08/11/25 3:45am

Recently helped a friend check his 2021 Bora 6AT, and the jerking issue is quite common. I feel it's mainly due to a software bug in the transmission control unit (TCU). Volkswagen didn't optimize the program well for that generation of cars, causing slow responses during low-speed gear shifts, which leads to jerking. The fluid is also crucial. I regularly maintain the car and found that when the transmission fluid isn't fresh or the level is low, the hydraulic system pressure becomes unbalanced, resulting in jerky shifts. The break-in period for new cars also has an impact; after driving tens of thousands of kilometers, the components break in better and the issue lessens. It's recommended that owners go to a 4S shop for a free software upgrade and change the oil on time, ideally every 40,000 kilometers. Daily driving should avoid being too aggressive; reducing shift loads during sudden acceleration or uphill driving can alleviate the issue significantly.

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