What symptoms will occur if the manual transmission fluid is not replaced?

[MargaretFitz]

Symptoms of not replacing the manual transmission fluid include: body shaking, gear shifting jerking; transmission high-temperature warning appearing on the dashboard; car stalling; unusual noises. Hazards of not replacing the transmission fluid for a long time: 1. Damage to the transmission's gear shift control mechanism; 2. Abnormal wear of gears and clutch plates inside the transmission; 3. Affecting the normal operation of the transmission, leading to damage to the transmission valve body. The methods for replacing transmission fluid are as follows: Loosen the drain screw at the bottom of the transmission to drain the fluid before refilling. Directly remove the transmission oil pan to drain and refill the fluid: This method is more thorough than the previous one, removing impurities at the bottom of the oil pan. Using a circulation machine to replace automatic transmission fluid: Dynamic oil change with an intelligent circulation machine can filter and clean sludge and impurities inside the automatic transmission.

[VanFrank]

If the manual transmission oil is not replaced, these troubles will occur: you will feel particularly stiff when shifting gears while driving, requiring more force to push the lever, and the gearbox noise will increase significantly, sounding harsh. After the oil ages and becomes dirty, its lubricating performance declines, accelerating the wear of gears and synchronizer rings, and reducing transmission efficiency, leading to an inexplicable increase in fuel consumption. If the situation worsens further, the transmission may overheat or even seize up and stop working, at which point you can only opt for expensive repairs or replacement. I recommend checking and replacing the oil every 60,000 to 80,000 kilometers to prevent these headaches.

[SanArthur]

If the manual transmission fluid is not changed, I've personally experienced symptoms like: rough shifting, occasional squeaking noises; increased noise levels causing irritation; and accelerated wear leading to rapid fuel consumption rise. In the long run, the transmission might fail with expensive repair costs. Remember, regular maintenance is key.