Is it normal for a dual-clutch transmission to make a clicking sound when shifting gears?

1 Answers
Lee
07/30/25 8:51am
If the dual-clutch transmission only produces a slight "click" sound during the gear shifting process, then this situation is perfectly normal and will not have any impact on the engine or transmission. The reason this sound mainly occurs in low gears is that the speed difference in the transmission is greater at low gears, and the torque fluctuation during shifting is larger than in other gears. If the transmission makes continuous clicking sounds while driving, it is necessary to have it checked at a repair shop as soon as possible. Explanation of the causes of abnormal sounds in dual-clutch transmissions: 1. Gear pre-engagement: The shift fork drives the shift assembly to quickly engage the synchronizer ring, achieving gear pre-engagement. 2. Dual-clutch working switch: The pre-engaged idling gear begins to bear the load, and the gap between the driving gear and the driven gear gradually decreases until they are fully meshed. During this process, slight metal knocking sounds may occur.
Was this review help?
12
2
Share
More Forum Discussions

What is the fuel consumption per 100 kilometers?

Car fuel consumption is categorized based on engine displacement. Below are specific details about fuel consumption per 100 kilometers: 1. 1.0L displacement: manual transmission consumes 4L, automatic transmission consumes 4.5 to 5L. 2. 1.5L displacement: manual transmission consumes 5L, automatic transmission consumes 6 to 7L. 3. 1.6L displacement: manual transmission consumes slightly over 5L, automatic transmission consumes 6 to 7L. Here are additional insights: 1. Method to calculate actual fuel consumption per 100 kilometers: X/100=50/600, where X is the actual fuel consumption per 100 kilometers, and the right side of the equation represents 50L of fuel consumed over 600 kilometers. Solving the equation, X=50×100/600. Answer: X≈8.33. Therefore, the actual fuel consumption per 100 kilometers is approximately 8.33L. 2. Reasons for sudden increase in fuel consumption: excessive carbon buildup in the engine, excessive air conditioning load. 3. Fundamental relationship: comparing naturally aspirated engines with naturally aspirated engines, and turbocharged engines with turbocharged engines reveals that the fundamental relationship is that higher displacement leads to higher fuel consumption.
1
2
Share

Is it better to use 92 or 95 octane gasoline for Santana?

According to the official vehicle manual recommendation, Santana should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, Santana owners can also find this information on the fuel tank cap, which will be clearly marked. Generally, the appropriate gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of some new technologies nowadays, the compression ratio alone cannot determine the gasoline grade to use. Even engines with high compression ratios can be tuned to use lower-grade gasoline. This is because, apart from the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If Santana occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower-grade gasoline, using higher-grade gasoline will not cause damage, but the increase in octane number will change the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance in practice. For vehicles recommended to use higher-grade gasoline, using lower-grade gasoline can cause engine knocking. Because the octane number is significantly lower, the gasoline's ignition point decreases, causing it to ignite prematurely during the compression stroke. If combustion occurs before the spark plug ignites during the compression stroke, resistance will arise during the upward stroke. This resistance will make the engine run very unstably. If the knocking is imperceptible, it will only increase noise without obvious damage to the engine. However, if the knocking is noticeable, it indicates severe engine conditions. The vibration not only affects driving stability but can also cause abnormal wear on the pistons and cylinders, and in severe cases, even cylinder scoring.
2
0
Share

What engine does the Audi S3 use?

The Audi S3 uses a Volkswagen engine with the model designation EA888. The Audi S3 is equipped with a high-performance 2.0TFSI engine, delivering a maximum power output of 300 horsepower and a peak torque of 380 Nm, paired with a 6-speed dual-clutch transmission. For daily maintenance of the Audi S3 engine, the following methods can be employed: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, choose CB--CD grade diesel engine oil according to mechanical load, ensuring the standard meets or exceeds the manufacturer's requirements. Regularly change the oil and filter. The quality of any lubricating oil will degrade over time with use. After a certain mileage, performance deteriorates, leading to various engine issues. To prevent malfunctions, change the oil regularly based on usage conditions and maintain the proper oil level. As oil passes through the fine pores of the filter, solid particles and viscous substances accumulate in the filter. If the filter becomes clogged and oil cannot pass through, it may rupture the filter or open the safety valve, allowing oil to bypass through the relief valve and carry contaminants back to the lubrication points, accelerating engine wear and increasing internal contamination. Periodically clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger quantities precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to flush the radiator. Removing rust and scale deposits not only ensures proper engine operation but also extends the overall lifespan of both the radiator and the engine.
10
4
Share

What are the Volkswagen engine models?

Volkswagen engine models include: EA211, EA111, EA113, EA888, EA390. These engines incorporate advanced technologies such as direct fuel injection and turbocharging, offering performance advantages like small displacement, high power, and low fuel consumption. Here are the detailed introductions: 1. The EA211 engine is an upgraded version based on the EA111, launched at the 2012 Geneva International Motor Show. This engine series includes three-cylinder and four-cylinder products, with the Volkswagen UP being the first model equipped with this series. Due to the cylinder deactivation system used in the four-cylinder engines, its fuel economy has been highly praised by consumers. 2. The EA113 is an eight-valve engine, meaning two valves per cylinder: one intake and one exhaust. From a technical perspective, the EA113 is less advanced than the 16-valve EA111. The most notable feature of the EA113 engine is its cast iron cylinder block, which is robust and durable. Currently, models like the New Bora, Lavida, POLO, and Golf are equipped with the EA113 series engines. 3. The EA888 engine holds a very important position for the Volkswagen Group. It is widely used, with almost all 1.8TSI and 2.0TSI models across various brands under the Volkswagen Group, including Volkswagen, Audi, Skoda, and SEAT, being equipped with this engine. 4. The EA390 might be less familiar since it is an imported engine. The EA390 is part of the VR6 naturally aspirated engine series, available in different displacements such as 3.0L, 3.2L, and 3.6L. It features direct fuel injection technology, four valves per cylinder, and a very small engine angle (only 10°-15°), making it compact. The Volkswagen Teramont is equipped with the EA390 engine.
17
5
Share

Should You Replace or Repair Waterlogged Headlights?

In most cases, simply turning on the headlights and allowing the moisture to dissipate naturally is sufficient. However, if the water ingress is severe, it's necessary to visit a professional repair shop for treatment. More information about headlight water ingress is as follows: 1. Causes of headlight water ingress: Poor sealing design of the headlight itself, improper sealing between plugs and wiring harnesses, poor gap definition between the headlight and the vehicle body, or damaged vent holes can all lead to water ingress, especially during car washing or rainy weather. Typically, water accumulation inside the headlight can be visibly observed, and it does not disappear after 1-2 hours with the headlights on. 2. Distinguishing between fogging and water ingress in headlights: (1) First, check for water flow traces. Fogging usually forms a thin film or dew-like droplets on the surface of the headlight cover without any water flow traces. Water ingress, due to the larger amount of water, forms dew droplets that flow from the top to the bottom of the headlight, leaving distinct water flow traces, similar to a waterfall, much like the trail left by a snail. (2) Determine by whether it disappears on its own. When fog appears inside the headlight, it takes approximately 1 to 1.5 hours with the headlights on to completely dissipate. In a static state, storing the vehicle in a dry environment with humidity <50% for 24 to 36 hours will allow the fog inside the headlight to disappear completely on its own—this phenomenon is considered fogging. However, if large areas of fog condensation appear on the inner wall of the lens, condensing into water droplets that flow downward and accumulate inside the headlight, and when the headlights are used for extended periods or multiple times, the fog reattaches to the inner surface of the lens as the temperature rises, this should be identified as water ingress.
15
5
Share

What is the engine model of the CT5?

LSY is the engine model of the Cadillac CT5, with a maximum power of 174KW and a peak torque of 350 N·m. The Cadillac CT5 is a domestically produced joint-venture vehicle, and its engine is also domestically manufactured. For the daily maintenance of the Cadillac CT5's engine, the following methods can be used: Use lubricating oil of the appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions. For diesel engines, choose CB--CD grade diesel engine oil according to the mechanical load, with the selection standard not lower than the manufacturer's specified requirements. Regularly change the engine oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, its performance will deteriorate, causing various problems for the engine. To avoid malfunctions, change the oil regularly based on usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter becomes clogged and oil cannot pass through the filter element, it may rupture the filter element or open the safety valve, allowing oil to bypass through the relief valve and carry contaminants back to the lubrication areas, accelerating engine wear and increasing internal contamination. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal powder from component wear to form sludge. In small amounts, it remains suspended in the oil, but in large amounts, it precipitates, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use a radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.
19
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.