What Are the Causes of Transmission Noise in the Haval F7?
4 Answers
Haval F7 transmission noise can be attributed to the following reasons: Wear and damage of bearings: When bearings wear out, the gap increases, and the fit precision decreases; when bearings are damaged, abnormal sounds occur as they cannot operate normally, potentially leading to damage of transmission components and exacerbating the issue. Wear of transmission components or the use of replacement parts with excessively low precision, such as worn gears or new gears with excessively large fit gaps compared to the original ones. Insufficient or overly viscous lubricant causing poor lubrication: In such cases, the corresponding lubricant (grease) should be replaced; otherwise, it will accelerate transmission wear and shorten its service life. Loose bolts on the transmission housing (end cover): Vibration during use can loosen the bolts, so regular inspections are necessary.
Speaking of transmission noise, my F7 had a similar issue last year. At first, there was a 'clicking' sound during low-speed gear shifts, which later developed into a 'whining' noise when decelerating. The 4S shop inspection revealed that the transmission fluid needed to be changed, and sure enough, the noise significantly reduced after the fluid change. The mechanic said prolonged neglect of fluid changes could lead to insufficient gear lubrication, causing metal friction sounds. However, if accompanied by jerking sensations, it might indicate worn clutch plates, which would require opening up the transmission. Remember to stick to regular maintenance—don’t follow my example of waiting until 60,000 km to change the fluid. And if you hear a 'clunking' noise, pay extra attention, as it could be a bearing issue that needs immediate repair.
I've repaired many Haval F7 transmission noise issues, which commonly fall into three categories: a 'buzzing' sound at low speeds is mostly caused by deteriorated transmission fluid or incorrect fluid level; a 'clunking' noise during gear shifts requires checking the dual-clutch module, especially for dry dual-clutch F7 models prone to wear; persistent metal grinding noises are likely due to bearing failure. Last time, a stubborn owner ignored the signs and ended up spending over 8,000 yuan on a complete transmission replacement. I recommend first checking the fault codes, then lifting the vehicle to pinpoint the noise source in different transmission areas—sometimes just replacing a mounting bushing can solve the problem.
The transmission noise in the Haval F7 is related to structural design. In early batches of the 7-speed dual-clutch transmission, the clutch semi-engagement was prone to overheating and producing a 'hissing' sound during frequent start-stop driving in urban areas. My friend's car developed a 'clunking' sound during gear shifts just after the warranty expired, and inspection revealed excessive clearance in the shift fork. The newer models have already improved the shifting mechanism. If there is brief noise during cold starts, it might be due to delayed oil supply from the oil pump; persistent noise should focus on checking the differential gears. However, the most troublesome issue is a control unit failure, which not only causes electrical buzzing but can also lead to gear misalignment.
