Common signs of transmission failure include specific manifestations such as gear shifting jolts, abnormal noises, oil leaks, abnormal temperatures, and power transmission failure. Noticeable vibrations or jerking during gear shifting are typically associated with solenoid valve malfunctions or fluid degradation, while metallic grinding noises during operation may originate from gear or bearing wear. If oil seepage is observed at the transmission's base, attention must be paid to insufficient lubrication caused by deteriorated seals or casing cracks; prolonged neglect will accelerate mechanical wear. Automatic transmissions exhibiting delayed shifting, harsh engagement, or gear lock-up may indicate abnormal hydraulic pressure or valve body clogging. For routine maintenance, manufacturer-recommended fluid should be replaced every 60,000 kilometres, with avoidance of abrupt acceleration and sustained heavy-load operation. Prompt diagnosis upon initial symptom onset is crucial to prevent fault escalation. As the critical power transfer component, transmission condition directly impacts driving safety and fuel efficiency, while periodic professional inspections significantly prolong service life.
