What Are the Common Faults of Manual Transmissions?
2 Answers
Manual transmissions commonly experience the following faults: 1. Oil leakage; 2. Abnormal noises; 3. Gear jumping; 4. Gear disarray. The functions of a transmission are: 1. To change the transmission ratio to meet the traction requirements under different driving conditions; 2. To enable reverse driving; 3. To interrupt power transmission to the drive wheels when the engine starts, idles, shifts gears, or needs to stop for power output. Maintenance methods for transmissions include: 1. Changing the automatic transmission fluid every 12 months or 20,000 kilometers; 2. Avoiding coasting in neutral; 3. Regularly checking the fluid level; 4. Avoiding skipping gears when upshifting; 5. Not forcing the transmission into neutral; 6. Not shortening the warm-up idling time; 7. Avoiding gear grinding when shifting; 8. Cleaning the transmission; 9. Avoiding driving immediately without warming up the vehicle.
Driving a manual transmission for a long time always comes with minor issues. What annoys me the most is when shifting isn't smooth, especially when the engine is cold—it feels like the gear lever is stuck in syrup. This is mostly due to incomplete clutch disengagement or worn synchronizers. Then there's the sudden rattling noise from the transmission while driving, like a bag of screws rolling around, which usually indicates loose bearings or lack of lubrication. The most dangerous scenario is when the gear suddenly pops out on the highway, causing the engine to rev wildly—a real heart-stopping moment that calls for immediate inspection of the shift linkage for looseness. I remember once after rain, I noticed oil seeping from under the transmission—a classic sign of aged seals. To avoid major repairs, remember not to force the gears and change the gear oil regularly.
