What is Transmission Jerking?
2 Answers
After engaging the gear, if the clutch is released directly, the engine will stall. When slowly releasing the clutch and pressing the accelerator, if the vehicle speed and gear position do not match, gear dragging is likely to occur, causing the car to jerk forward without stalling. Below are the reasons for transmission jerking: Upshift Jerking: Due to the transmission's response speed not being fast enough, the upshift speed cannot keep up with the accelerator pressing speed. At the moment of gear shifting, the transmission jerks. Downshift Jerking: Because of the intervention of the energy recovery system, once the driver releases the accelerator pedal or presses the brake pedal, the generator immediately starts working, imposing some burden on the engine, affecting the engine speed, and causing the engine speed to be out of sync with the clutch plate speed, resulting in a jerking sensation. Low-speed Jerking: During low-speed driving, frequent shifting between first and second gears causes the clutch to continuously disengage and engage, preventing smooth power transmission in a short time, leading to common low-speed jerking. Jerking sensations during startup and low-speed driving are generally caused by turbocharger intervention at low RPMs, affecting the engine speed.
I've been driving for half my life, and transmission hesitation is that jerky feeling when shifting gears, like the car suddenly can't catch its breath, with noticeable impacts during acceleration or deceleration. The most common cause is old or insufficient transmission fluid becoming dirty, leading to unstable pressure and rough shifting. It could also be faulty sensors causing the computer module to misjudge the timing. Back when I drove manual transmissions, hesitation was rare, but with today's highly electronic automatic transmissions, this issue is more common. To fix it, I recommend first checking the fluid level and replacing it if necessary; regular maintenance can prevent bigger problems. If you feel significant shuddering, get it checked at a repair shop immediately. Don't ignore it—prolonged hesitation can damage gears, making repairs far more expensive.
