Why is there a noise when shifting gears in an automatic transmission?
2 Answers
When an automatic transmission car makes a buzzing noise during gear shifting, it is due to stubborn dirt and impurities inside the transmission, especially when these contaminants accumulate inside the valve body, forming blockages that prevent effective regulation of oil pressure, leading to abnormal noises. Below is relevant information: 1. Solution: To address the abnormal noise during gear shifting in an automatic transmission, it is necessary to remove the stubborn dirt and impurities inside the transmission and effectively control the transmission's operating temperature. This will thoroughly resolve the transmission issue and prevent its recurrence. 2. Automatic Transmission: An automatic transmission has a self-locking device and a locking mechanism. The self-locking device prevents the gear from disengaging or changing the selected gear due to vibrations while driving. The self-locking device mainly consists of a spring, steel ball, and groove. When the driver selects a gear, the spring in the self-locking device presses the steel ball into the groove, locking the gear in place to prevent unintended disengagement. When manually shifting gears with the gear lever, the steel ball forcibly compresses the spring and exits the groove. Once the desired gear is engaged, the steel ball is pushed back into the groove by the spring, producing a "click" sound.
I've encountered gear shift noises quite often. The most common causes are aged or contaminated transmission fluid – when the oil isn't slippery enough, you'll hear creaking sounds during shifts. Worn gears can also produce clicking noises, especially in older high-mileage vehicles where small components become loose and struggle to move. Improper installation can be another culprit, such as loose chassis parts causing vibration noises. My advice is to first do a simple check of the fluid level and quality – if it's dark or blackened, it's time for a change. If the noise gets progressively louder with a harsh tone, visit a repair shop immediately before it escalates into major damage. Minor fixes won't cost much, and proper maintenance keeps your ride smooth. Never skimp on regular upkeep – scheduled fluid changes are always the right move.
