What are the symptoms of a damaged transmission bearing?
2 Answers
When a transmission bearing fails, it will produce significant noise and the temperature will rise accordingly. In severe cases, the bearing may become misaligned, which can affect the safety of the vehicle. It is recommended that the driver promptly visit a repair shop to replace the transmission bearing. Abnormal noises from the transmission area: If abnormal noises are heard from the transmission area while the car is idling or driving, it may be due to insufficient or deteriorated transmission fluid, worn or loose transmission bearings, damaged bearings, bent transmission shafts, or improper gear meshing. If the transmission housing feels hot to the touch, this is likely caused by insufficient or deteriorated lubricating oil. In such cases, the oil should be topped up or checked, and replaced if necessary. Abnormal noises in neutral gear: If the noise disappears when the clutch pedal is depressed, it is usually due to worn or loose transmission bearings or issues with the constant mesh gears. If the noise persists in all gears, it is likely the rear bearing of the secondary shaft. Severely worn or damaged bearings should be repaired or replaced. Abnormal noises during low-speed driving: If irregular noises occur during low-speed driving, which turn into chaotic gear clattering as the speed increases, it may indicate poor gear meshing in the transmission. If the noise is slight and uniform, the vehicle may continue to be used for further break-in. If the noise is severe and uneven, the transmission should be inspected, and readjusted or replaced if necessary.
If the transmission bearings are damaged, the most noticeable symptom while driving is hearing a continuous humming or whirring sound, which typically increases in volume with higher speeds, especially when accelerating or cruising at high speeds. You may also feel vibrations through the steering wheel or seats, particularly during gear shifts when the transmission hesitates or operates roughly. Acceleration may feel inconsistent, as if the vehicle is struggling. I've encountered similar situations and found that if not addressed promptly, bearing wear debris can damage internal gears, leading to more severe transmission failures. The noise may sometimes change in pitch when turning, which is worth noting. It's advisable to seek professional diagnosis at a repair shop as soon as these signs are detected to avoid safety risks. Regular inspection of transmission fluid quality during routine maintenance can also help prevent issues.
