Why does the automatic transmission jerk when shifting gears?
3 Answers
Here are the specific reasons for the jerking sensation during gear shifts in an automatic transmission: 1. The jerking sensation is largely due to issues with the transmission fluid. Some car owners neglect transmission maintenance, leading to overdue transmission fluid changes that affect the transmission's performance. 2. Excessive carbon buildup in the engine or throttle body. It is necessary to disassemble the intake pipe and manually clean the throttle body to remove carbon deposits, which can eliminate abnormal conditions like idle jerking. 3. Engine aging, requiring replacement of parts. 4. Malfunction in the ignition system, requiring timely inspection of the spark plugs.
I also experienced gear shift jerks when driving automatic transmission cars before, which is quite common. In many cases, it's because the transmission fluid needs to be changed. Aged fluid causes the torque converter to operate less smoothly, unable to transfer power steadily, especially when shifting from low to high gears where jerks are more likely to occur. Another common reason is clutch wear or slipping. If the mileage exceeds tens of thousands of kilometers, part fatigue can cause delayed gear shifting, leading to brief vibrations. It could also be an issue with the engine's sensors, such as carbon buildup on the throttle body or ignition coils, affecting the power output rhythm. When encountering this problem, I think it's best to first check the transmission fluid level and color; if it's black, replace it as soon as possible. Regular maintenance is crucial, like performing transmission maintenance every 20,000 to 30,000 kilometers to prevent failures. Delaying repairs may lead to complete transmission failure, and the replacement cost can be very high, not worth the risk. In short, don't worry too much, but go to a professional shop early for a check to ensure driving safety.
Hey, I've been driving automatic transmission cars for years, and the occasional jerk during gear shifts is really annoying. It's usually caused by sticking solenoid valves in the transmission or malfunctions in the electronic control system. Modern cars rely on computer-controlled gear shifting, and if the wiring gets damp or the ECU program has errors, the response can become sluggish. Worn spark plugs are also a common culprit, causing uneven power output that makes the car shudder. Additionally, the universal joints on the drive shaft might be loose or lack lubrication, leading to rough power transfer. I once took my car to a repair shop for this issue, and they quickly found a clogged oil passage—cleaning the filter screen fixed it. I suggest trying some simple self-checks: look for any warning lights on the dashboard and listen for unusual engine sounds. If the problem persists, don't push it—get a professional diagnosis at a reputable repair shop. Addressing it promptly can prevent roadside breakdowns and daily disruptions. With proper maintenance, this kind of shuddering can be significantly reduced.
