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Why Does an Automatic Transmission Car Have Jerking Sensation When Starting?

2 Answers

MacEloise

07/28/25 8:44pm

Automatic transmission car starting with jerking sensation reasons: If you want to accelerate sharply while driving, you need to press the accelerator pedal deeply. At this time, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it will upshift. After upshifting, because the speed will drop significantly, a relatively obvious jerking sensation will occur. After starting an automatic transmission vehicle, if you want to drive smoothly, you can lightly press the accelerator pedal at the appropriate time, and the transmission will automatically upshift. At this time, the gear shift jerking sensation is weaker; if you want to maintain good acceleration performance, you need to press the accelerator pedal deeply, and the automatic transmission will upshift to a higher gear at a higher speed. At this time, the gear shift jerking sensation is more obvious.

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Colin

08/12/25 1:28am

My car has been jerking a lot when starting recently, which is really annoying. Upon reflection, jerking during acceleration in an automatic transmission car could be due to deteriorated transmission fluid or torque converter issues. If the fluid level is low or too dirty, the friction between the clutch plates and clutches won't be smooth, causing shaking during acceleration. Just like my old car, which hadn't had its fluid changed in eight years—the jerking was especially noticeable when starting. Additionally, minor issues with the ignition system can also interfere with the engine's power output, making the start unstable. I recommend checking the fluid level and color and changing it promptly. Also, avoid flooring the accelerator when starting—easing into the throttle can help mitigate the problem. Driving habits matter too; gentle driving can reduce wear. In short, don't delay—get a comprehensive check at a professional shop. Letting this issue persist will only accelerate transmission failure. Oh, and regular maintenance can prevent such situations—check the engine condition monthly and treat your car well.

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What is the Scrap Age Limit for Passenger Cars?

For 5-seat family cars and 7-seat SUVs, as well as non-commercial small and mini vehicles, there is no usage age limit. However, when the normal mileage reaches 600,000 kilometers, the state will guide the vehicle to be scrapped. In addition to the above vehicles, small and mini non-commercial passenger cars, large non-commercial cars, and wheeled special machinery vehicles also have no usage age limit. Commercial vehicles have scrap age limits, as follows: Small and mini taxi passenger cars have a scrap age limit of 8 years, medium-sized taxi passenger cars have a limit of 10 years, and large taxi passenger cars have a limit of 12 years. Public transport passenger cars have a scrap age limit of 13 years, other small and mini commercial passenger cars have a limit of 10 years, and large and medium-sized commercial passenger cars have a limit of 15 years. Mini commercial trucks have a scrap age limit of 8 years, while light and large commercial trucks have a limit of 10 years. The vehicle scrapping process is as follows: The vehicle owner applying for scrapping and renewal must fill out an "Application Form for Vehicle Modification, Transfer, Alteration, Suspension, or Scrapping" and stamp it with the owner's seal. The registration office will accept the application and issue a "Vehicle Scrapping Notice" for vehicles that have reached the scrap age limit. For vehicles that have not reached the scrap age limit, the vehicle inspection office will determine if they meet the scrapping standards and issue a "Vehicle Scrapping Notice" if applicable. The vehicle owner can choose a qualified recycling company to dismantle the vehicle based on the "Notice." The recycling company will dismantle the vehicle and take photos after verifying the "Notice." The engine must be separated from the vehicle, the engine block must be broken, and the frame (chassis) must be cut. The vehicle owner must submit the "Modification Form," "XX Province Vehicle Renewal Technical Appraisal Form," "Scrapped Vehicle Recycling Certificate," and photos of the dismantled vehicle to the vehicle inspection office for verification and signature. The license plates will be reclaimed, and the scrapping registration will be processed according to regulations. Special Notes: According to Article 30 of the "Motor Vehicle Registration Regulations," if the vehicle is damaged and cannot be driven back to the registration location, the owner may submit the vehicle for scrapping to a local recycling company. If a commercial vehicle is converted to non-commercial use, it must still be scrapped according to the original commercial vehicle's scrap age limit. According to Article 43 of the "Motor Vehicle Registration Regulations," after completing the transfer or deregistration of a motor vehicle, the original owner may apply to the vehicle management office to use the original license plate number when registering a newly purchased vehicle. The following conditions must be met: (1) The application must be submitted within six months after the transfer or deregistration; (2) The owner must have owned the original vehicle for more than three years.

What does car group buying mean?

Car group buying refers to companies, organizations, and individuals purchasing multiple vehicles of the same brand or the same model simultaneously, with dealers offering certain discounts. Relevant extended information is as follows: 1. Car group buying: It involves many potential car buyers forming a group through various means such as the internet, text messages, or phone calls, assembling a team of dozens or even hundreds of people to collectively negotiate with dealers to purchase new cars at preferential prices. This purchasing method is a consumption behavior that leverages quantity to pressure prices, with the final transaction price depending on factors such as the car model, quantity purchased, and dealer profits. 2. New consumption model: As a currently popular car purchasing method, group buying is not new in other industries, but for high-priced products like cars, group buying is not as simple as wholesale for other products. However, with careful and thorough planning and organization, more people are buying cars through group buying, and car manufacturers and dealers are increasingly supporting this new consumption model.

What are the reasons for a car having power but failing to start?

The reasons for a car having power but failing to start are: 1. Blown fuse, open circuit in the high-voltage coil, or open circuit in the low-voltage circuit; 2. Dislodged central ignition coil; 3. Leakage in the distributor rotor; 4. Damaged spark plug; 5. Faulty central computer control board; 6. Malfunctioning fuel pump, blocked fuel line, clogged fuel filter, carbon buildup on spark plugs, or damaged fuel injector. The solutions for a car having power but failing to start are: 1. Check if the fuel level is insufficient and refuel promptly; 2. Inspect the condition of the car's timing belt; 3. Replace the spark plug; 4. Check if the engine intake pipe is blocked or has water ingress; 5. Inspect the fuel system for any faults.

Should the handbrake be engaged or released while driving?

When driving, the handbrake should be released, and when parking, the handbrake should be engaged. Its function is to keep the vehicle stationary when parked, preventing it from rolling downhill. Precautions for using the handbrake: 1. Avoid pulling it too tightly to prevent system damage; 2. Avoid using the handbrake for long-term parking on slopes; 3. Do not engage the handbrake while driving at high speeds; 4. Release the handbrake before starting the car. Driving with the handbrake engaged can damage the braking system, with the following hazards: 1. Accelerated wear of the brake discs and hardening of the brake pads due to overheating, leading to reduced braking performance; 2. Excessive wear of the handbrake brake pads, causing damage to the drive shaft; 3. Locking of the rear wheels and snapping of the handbrake cable, which may result in skidding or rollover.

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When a vehicle reaches a mileage of 40,000 kilometers or has been in use for 2 years, the transmission fluid needs to be changed. However, if the owner has purchased a Japanese model, the replacement interval can be slightly extended, and the fluid can be changed when the mileage reaches approximately 50,000 to 80,000 kilometers. Below is a related introduction about transmission fluid: The function of transmission fluid: It is an oil product that keeps the gear system clean, lubricates to extend the lifespan of the transmission device, and provides effective lubrication even under low-temperature conditions, reducing oil loss under harsh operating conditions. Characteristics of transmission fluid: Most transmission fluids can be used in automatic transmissions currently available on the market. In fact, each automatic transmission design has different technical requirements. Even the same model of transmission configured in different vehicles will vary in torque, weight, speed, structure, etc. Therefore, the original manufacturer specifies its own dedicated transmission fluid. Different transmission fluids are one of the factors affecting the quality of gear shifting.

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