What's the reason for a Volkswagen 7-speed dual-clutch transmission not moving when engaged?
2 Answers
Volkswagen 7-speed dual-clutch transmission not moving when engaged may be due to the following reasons: Automatic transmission oil pan leakage: Loosening of the linkage or cable between the control lever and the manual valve rocker arm, manual valve remaining in neutral or parking position, clogged oil pump inlet filter screen, severe leakage in the main oil circuit, or oil pump damage. Not pressing the accelerator: Some automatic transmission vehicles can move when shifted to D gear and the brake is released, while others require pressing the accelerator to move. This is actually related to the type of transmission power coupling device. After shifting to D gear, the clutch remains disengaged, and no power is transmitted, so the vehicle does not move. When the accelerator is pressed, the clutch gradually engages, allowing power to be transmitted, and the vehicle begins to move forward.
Most of the Volkswagen dual-clutch gear engagement failures I've encountered are related to two components. One is the mechatronic control unit, which acts as the brain of the transmission. If it fails, signals can't reach the clutch, resulting in no response when shifting to D gear. Another common issue is excessive clutch disc wear, especially in vehicles frequently stuck in traffic—the constant semi-engagement of the dual-clutch can easily cause overheating and burning. Last time I drove a Golf 7, I encountered this problem: after shifting, the RPM surged but the car didn't move. Later, a 4S店 inspection revealed insufficient transmission oil pressure prevented clutch engagement. I recommend checking the dashboard immediately for a yellow gear warning light. If this issue persists, it could damage the entire transmission module, with repair costs easily exceeding tens of thousands. As a temporary fix, try disconnecting and reconnecting the battery—sometimes this can reset a frozen electronic system.
