What causes the friction noise in the Chery E3 transmission?

[OMicah]

Chery E3 transmission friction noise causes are as follows: Bearing wear: Bearing wear and damage. When bearings wear, the gap increases and the fit accuracy decreases; when bearings are damaged, abnormal noise occurs due to improper operation, which may even damage transmission components and worsen the fault. Low component precision: Worn transmission components or replacement parts with excessively low precision, such as gear wear or new gears with excessive clearance compared to original gears. Lubrication issues: Insufficient lubrication or excessively high viscosity causing poor lubrication. The corresponding lubricant (grease) should be replaced, otherwise it will accelerate transmission wear and shorten service life.