Why Does the Transmission Make Abnormal Noises When Downshifting at High RPM?
1 Answers
The causes of abnormal noises in the transmission are as follows: 1. Wear and damage of bearings: When bearings wear out, their clearance increases, leading to a decrease in fitting accuracy; when bearings are damaged, abnormal noises occur because the bearings cannot operate normally, which may even damage the transmission components and exacerbate the issue; 2. Low precision of components: This is caused by the wear of transmission components or the use of replacement parts with insufficient precision, such as excessive clearance between worn or newly replaced gears and the original gears; 3. Insufficient lubrication or excessively high oil viscosity leading to poor lubrication: In this case, the corresponding lubricating oil (grease) should be replaced, otherwise it will accelerate the wear of the transmission and shorten its service life; 4. Loose bolts on the transmission housing (end cover): Vibration during use can loosen the bolts, so regular inspections are necessary.