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What Causes the Abnormal Noise When Engaging Fifth Gear?

1 Answers

Harper

07/29/25 8:43pm

Transmission housing damage, gear surface fracture, or improper transmission assembly can cause abnormal noise when engaging fifth gear. Transmission Housing Damage: Long-term wear and deformation of the transmission housing and bearing seat holes. This noise is loudest when engaging low gears and gradually decreases when shifting to higher gears, with the direct gear being the quietest. Gear Surface Fracture: Impact during meshing due to fracture of individual gear surfaces. Engaging this gear position will cause strong impact and vibration, leading to resonance in the transmission housing. Improper Transmission Assembly: Improper replacement of gears, needle bearings, or bushings in a specific gear position, or abnormal assembly clearance, resulting in poor gear meshing and abnormal noise during transmission. Solutions for Abnormal Noise When Engaging Fifth Gear: Fully depress the clutch, check and tighten the linkage mechanism, replace damaged clutch plates, master the correct gear-shifting method (ensure full engagement), check the clutch if separation is incomplete, and tighten the gear lever if loose (due to loose connecting rubber bushings).

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