What Are the Causes of Noise in Universal Transmission Devices?
3 Answers
There are three main causes of noise in universal transmission devices: 1. Loose universal joint bearings due to wear or impact. 2. Loose splines in the driveshaft slip joint due to wear or impact. 3. Loose bolts in the universal joint flange connection. Below is an introduction to the application of universal transmission devices in automobiles: 1. Between the transmission (or transfer case) and the drive axle: Generally, the transmission, clutch, and engine of a car are integrated and mounted on the frame, while the drive axle is connected to the frame via suspension. Changes in load and road unevenness during driving can cause variations in the angle and distance between the drive axle input shaft and the transmission output shaft. 2. Between the transmission and transfer case in off-road vehicles: To eliminate the impact of coaxiality errors caused by frame deformation, manufacturing, and assembly on power transmission, a universal transmission device must be installed. 3. The half-shafts of the steering drive axle are segmented; during steering, the axes of the two half-shafts intersect, and the angle changes, necessitating the use of a universal joint. 4. For a disconnected drive axle, the differential housing is fixed to the frame, the axle housing swings up and down, and the half-shafts are segmented, requiring the use of a universal joint. 5. The steering shaft of some vehicles is equipped with a universal transmission device, which facilitates the overall layout of the steering mechanism.
I've discussed similar issues with mechanics before. The most common cause of abnormal noises in universal drive assemblies is insufficient lubrication, which increases friction between internal metal components. When you hear particularly noticeable rattling sounds during turns or acceleration, it's likely due to worn universal joints. Additionally, improper installation or long-term vibration-induced loosening of components can also cause noises. If left unaddressed, the noise will progressively worsen and may even damage the entire drivetrain, compromising driving safety. I recommend regular vehicle inspections and prompt professional checks of grease conditions when abnormal sounds occur, ensuring all components are properly tightened. Frequent driving on rough roads can also accelerate component fatigue, so maintenance is key.
Having driven for over a decade, I've noticed that abnormal noises from universal transmission devices are particularly common in older vehicles. Once, when I inspected it myself, I found that the universal joint bearing had failed—dried-up lubricant had accumulated dust, causing a screeching noise. Another cause is wear or deformation of components on the driveshaft. For example, if you hear unusual noises during sharp turns, it's likely this part is the issue. Never underestimate these noises—they can reduce transmission efficiency and increase fuel consumption. I recommend developing a habit of inspecting undercarriage components every six months and applying high-quality grease. Prevention is better than cure; addressing issues early saves money and brings peace of mind.
