What Causes the Buzzing Sound When Shifting to Reverse Gear in an Automatic Transmission Car?
1 Answers
The reasons for the buzzing sound when shifting to reverse gear in an automatic transmission car are as follows: 1. Dirt and impurities: There may be stubborn dirt and impurities inside, especially when they accumulate in the valve body, forming a blockage that prevents effective regulation of oil pressure, leading to abnormal noises. 2. Gears: Since most vehicles' reverse gears are not equipped with helical gears and synchronizers, the gears directly mesh with each other. Therefore, if a very loud noise occurs when shifting to reverse gear in an automatic transmission, it is mostly due to incomplete gear meshing, which is a normal phenomenon.