What causes the jerking when starting or reversing an Audi A6?
2 Answers
Damaged solenoid valves and sludge in the transmission fluid are significant causes of jerking. Damaged Solenoid Valves: One major reason for jerking is damaged solenoid valves. The sensation of jerking is akin to being kicked from behind. Jerking can be either occasional or occur at fixed intervals. The distinction is simple: occasional jerking happens unpredictably, while fixed jerking occurs at a certain RPM, during specific gear shifts (e.g., from 2nd to 3rd gear), or at a fixed speed. Sludge in Transmission Fluid: Sludge in the transmission fluid can circulate within the transmission, clogging the oil passages in the valve body, leading to jerking. Over time, this can cause a series of transmission issues such as overheating, impact, slipping, and more.
With years of experience in car repair, common causes of jerking during starting or reversing in an Audi A6 include internal transmission issues, such as clutch wear leading to inconsistent power delivery, or faulty oil pressure regulators causing rough gear shifts. Additionally, excessive engine carbon buildup can affect low-speed performance, making the car jerk during reversing. I recommend first checking the transmission fluid condition at a professional shop. If the fluid is dirty, replacing it can alleviate the issue. For more severe problems, the clutch system may need servicing. Regular maintenance, including periodic carbon cleaning and sensor checks, can prevent such troubles. Remember, jerking is more noticeable in winter due to poor oil fluidity in cold temperatures, so it's best to warm up the engine for a few minutes before operating the vehicle.