What causes the grinding noise when shifting gears in a Fast Small 8-speed transmission?
1 Answers
Reasons and solutions for abnormal noise when shifting gears in a Fast Small 8-speed transmission are as follows: 1. Housing damage: Long-term wear and deformation of the transmission housing and bearing seat holes. This noise is loudest when shifting into low gears and gradually decreases when shifting into higher gears, with direct drive producing the least noise. Solution: Inspect and repair the transmission. 2. Gear face breakage: Breakage of individual gear faces causes impact during meshing. When shifting into the affected gear, strong impact and vibration occur, leading to resonance in the transmission housing. Solution: Inspect and repair the gears. 3. Improper transmission assembly: Improper replacement of gears, needle bearings, or bushings in a specific gear position, or abnormal assembly clearance, results in poor gear meshing and abnormal noise during transmission. Solution: Reassemble the transmission.