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What is the reason for the severe jerking during Buick Excelle's acceleration?

2 Answers

LilaDella

08/26/25 5:46am

If the Excelle car experiences jerking, you can first check whether the transmission has water ingress. If so, replacing the oil may resolve the issue. To address the jerking sensation, it is necessary to clean the throttle valve carbon deposits, inspect the fuel injectors for blockages, and check the spark plugs. Below is a partial introduction regarding the jerking sensation in cars: 1. Special circumstances: Check whether the ignition system has water ingress. Sensors or water ingress in the intake system may cause the air filter to become wet, thereby affecting the air intake volume, with a small amount of water entering the intake. 2. Causes: The transmission oil circuit may be stuck or not flowing smoothly. Wear on the oil circuit plate, long-term lack of transmission oil changes leading to deterioration and reduced lubrication effectiveness, excessively dirty transmission filter affecting filtration performance, allowing worn particles to enter the valve body.

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VanJoseph

09/08/25 8:12am

My car is a Buick Excelle, and last year I experienced jerky starts that felt like riding a horse. After checking with several repair shops, I found that the main causes were deteriorated transmission fluid and worn valve body. This car uses a GM 6AT transmission, and over time, the accumulated impurities in the old fluid caused unstable oil pressure, leading to jerky gear shifts. I also discovered that the torque converter clutch was slipping, resulting in inconsistent power delivery during acceleration. During the repair, I replaced the transmission fluid with full synthetic oil and cleaned the valve body, which immediately reduced the jerking by 80%. I recommend checking the fluid condition every 40,000 km—don’t wait until the filter is clogged, as that would require a major transmission disassembly. By the way, frequent short-distance driving can also cause the transmission fluid to overheat and degrade faster. I’ve since made it a habit to take a weekly highway drive, and the situation has improved significantly.

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