Reasons for Abnormal Noise in Song Pro Transmission
1 Answers
The causes of abnormal noise under different conditions are summarized as follows. Abnormal noise in transmission when in neutral gear: If there is abnormal noise in neutral gear and the noise disappears after pressing the clutch pedal, it is generally due to wear or looseness of the front and rear bearings of the transmission shaft or noise from the constant-mesh gears. If the noise occurs in any gear, and if it is the rear bearing of the second shaft that is making noise, severely loose or damaged bearings should be repaired or replaced. Abnormal noise in transmission during low-speed driving: During low-speed driving, if there is a rhythmless "clatter, clatter, clatter" noise that turns into more chaotic gear impact sounds when the speed increases, and the noise persists when shifting gears, it may be caused by poor gear meshing in the transmission. If the noise is slight and relatively uniform, it can continue to be used after running-in. If the noise is severe and uneven, the transmission should be disassembled for inspection, and readjustment or replacement should be performed if necessary. Abnormal noise in transmission during engine idle operation: During engine idle operation, if there is a rhythmic "clatter, clatter, clatter" noise that becomes more severe when the throttle is increased, accompanied by vibration in the transmission, it is generally caused by flaking of the gear surface or broken gear teeth. If the noise is due to incorrect assembly or misalignment of the gear center during repair, the transmission should be disassembled for inspection, and new parts should be replaced if necessary.
