What are the causes of transmission noise in the Envision?
2 Answers
The causes of transmission noise in the Envision are: 1. Issues with the transmission fluid itself, where excessive viscosity in cold conditions leads to poor fluidity during operation, causing abnormal behavior in working components. 2. Problems with the transmission itself, such as internal pressure leaks, malfunctioning valve bodies or hydraulic pistons, resulting in improper alignment of the conical wheel position. Below is a detailed introduction to the Envision's transmission: 1. The Envision's transmission is assembled and produced in mainland China; the dual-clutch transmission combines the advantages of manual and automatic transmissions, eliminating the torque converter and instead using two sets of clutches that alternate to achieve seamless gear shifting. 2. The two sets of clutches control odd and even gears respectively. Specifically, before shifting, the DSG pre-engages the next gear. Upon receiving the shift command, the DSG quickly signals the engine to increase speed, at which point the pre-engaged gear swiftly engages while the first clutch fully disengages, completing an upshift. Subsequent actions follow similarly. 3. Without a hydraulic torque converter, the engine's power can be fully utilized. Additionally, the alternating operation of the two clutches ensures extremely short shift times, minimizing power interruption from the engine.
After driving the Enclave for so long, I've experienced transmission noise issues, most commonly caused by internal bearing wear or friction between gears. Over time, these components can age, especially when you hear clicking or humming sounds during gear shifts. Additionally, insufficient or dirty transmission fluid can worsen the noise due to inadequate lubrication. I remember one time when my car's abnormal noise increased and it felt off while driving. After taking it to the 4S shop, they found the fluid was low, and topping it up with new fluid fixed the issue. If ignored for too long, it might require major repairs or even a full transmission replacement, which is costly and dangerous. I recommend regular fluid changes and check-ups, especially as the vehicle ages. Don't wait until major problems arise to take action—by then, it might be too late to regret.
