What Causes the Buzzing Sound When Reversing in an Automatic Transmission?
2 Answers
Hearing abnormal noises when reversing in an automatic transmission is due to gear shift shock. Below are the causes and solutions for gear shift shock: 1. Faulty clutch plates inside the transmission: Solution: If the transmission fluid smells burnt, it indicates that the clutch plates inside the transmission are burnt out. The transmission needs to be repaired. 2. Transmission system malfunction: Solution: If the transmission system shows a fault code, repairs should be carried out according to the fault code (be sure to go to a professional auto repair shop for repairs). 3. Faulty oil control valve: Solution: If the internal valve body of the oil control valve is burnt out, it needs to be repaired at a repair shop.
I've been driving automatic transmission cars for over twenty years, and several times when reversing, I heard a buzzing sound, like a bee buzzing around in the engine compartment. At first, I thought it was a fan issue, but upon inspection, I found that the transmission fluid was dirty or low, causing the gears to turn roughly during reverse. After changing the oil, it became quiet again. If ignored, the noise would get louder, and the gears could wear out faster, leading to expensive transmission repairs. It's important to check the fluid level regularly—I recommend checking the dipstick every month. Also, remember not to shift too aggressively when reversing, as it can increase the load. Fix small issues promptly to avoid costly major repairs.
