Is It Normal for Dual-Clutch Transmissions to Jerk During Start-Up?
4 Answers
Dual-clutch transmission jerking during start-up is not normal. Below are detailed explanations of the causes for dual-clutch start-up jerking: 1. Jerking during start-up in dual-clutch transmissions: This occurs due to inaccurate semi-engagement control of the clutch. Because the gear ratios between low gears are large and the torque amplification in low gears is high, it requires high shift control precision and prolonged semi-engagement for smooth operation. 2. Shuddering: Shuddering is caused by intermittent slipping of the clutch plates and fluctuating changes in friction force, meaning the clutch cannot achieve smooth semi-engagement. Additionally, since there are torsional damping springs between the engine and the clutch, it may also resonate with various wave forces, exacerbating resonant shuddering at certain frequency ranges under fluctuating friction conditions.
After driving for so many years, I find it quite common to occasionally experience some jerking when starting with a dual-clutch transmission. The transmission design involves two sets of clutches switching gears, and if the initial shift isn't smooth, you might feel a slight jolt—similar to the unsteadiness when suddenly accelerating during a walk in the park. In most cases, as long as the jerking isn't too severe and the engine sounds normal, there's no need to worry. Several cars I've driven, like Volkswagen's DSG or Ford's PowerShift, exhibit this minor issue during low-speed starts, especially during cold starts or when the throttle is pressed gently. Only if the jerking becomes as frequent as severe shaking should you rush for a check-up, as it might indicate worn clutch plates or electrical issues. Adjusting your driving habits, such as pressing the throttle more firmly during starts, can actually reduce the jerking sensation.
As a car enthusiast, I often test drive different models, and the jerky start with dual-clutch transmissions is a common phenomenon. The working principle of the transmission determines that imperfect adjustment of the two clutch engagement points during the initial acceleration phase can cause jerking. I've experienced it while driving a friend's new car—slight vibrations aren't a big issue. However, if the car isn't fully warmed up, it can be more noticeable in cold temperatures. Also, if you drive too cautiously, the jerky start is more likely to occur. I recommend monitoring the frequency first. If there's severe shaking with every start or unusual noises, it might indicate a clutch issue. I've seen other owners share on forums that regular transmission maintenance can alleviate this problem. Ultimately, different models have varying tuning designs, so there's no need to panic excessively.
I was quite surprised when my new car showed some jerking during starts with the dual-clutch transmission. Friends told me it's normal. The transmission tends to have minor fluctuations during low-speed gear shifts. As long as it doesn't keep shaking constantly, you'll get used to it after driving for a while. Adjusting your driving style, like not pressing the throttle too lightly, can reduce discomfort. There's no significant long-term impact from this behavior.
