What Causes the Abnormal Noise from the Driveshaft While Driving?
2 Answers
Car driveshaft abnormal noise is caused by a bent driveshaft or improper installation. The driveshaft is a high-speed, minimally supported rotating body, so its dynamic balance is crucial. Bent Driveshaft: The abnormal noise from the driveshaft is usually due to bending or denting, causing imbalance during operation, leading to wobbling and noise. Improper Installation: If the universal joint forks at both ends of the driveshaft are not installed on the same plane, or if the original balance weights are not reinstalled in their original positions, the balance state is disrupted. Loose connecting bolts of the universal joint coupling, loose fixing bolts of the driveshaft intermediate support, etc., can all cause abnormal noise from the driveshaft. Solutions for Driveshaft Abnormal Noise: Start the car engine and engage a high gear to observe the driveshaft wobble. If the wobble is greatest when the speed decreases, it indicates wobble and noise caused by imbalance; otherwise, it is noise caused by looseness. If the noise is not severe, drive back for repair; if severe, stop immediately for repair.
After driving for so many years, I've heard a lot about driveshaft noise issues, and I've encountered it once myself: the car makes a clunking sound when accelerating, and it's even more noticeable when decelerating. The main problem often lies in the universal joint of the driveshaft. This part connects the front and rear sections like a joint, and over time, it can wear out or run out of lubrication, causing metal friction sounds when there's insufficient grease. Another possibility is a damaged center bearing or a deformed driveshaft itself. Frequent driving on bumpy roads can cause it to bend, worsening the noise. Additionally, loose screws or improperly secured clips are common culprits. This issue shouldn't be taken lightly—it can worsen over time, affecting power transmission and even leaving you stranded on the road. So, it's advisable to have regular check-ups, especially during oil changes, and ask the mechanic to inspect the driveshaft. Adding some grease can save you a lot on repairs. When driving, try to accelerate smoothly and avoid stomping on the gas pedal to reduce wear and tear.
