What sound does a faulty differential bearing make in the Teana?
2 Answers
Teana differential bearing noise is a severe "rumbling" sound caused by bearing wear. Here is an introduction to the differential bearing noise in the Teana: The differential mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. Function: When the car is turning or driving on uneven roads, it allows the left and right wheels to roll at different speeds, ensuring that both drive wheels perform pure rolling motion. The classification of differentials is as follows: 1. Gear-type differential. Due to its structure, this type of differential distributes equal torque to the left and right wheels. This torque-equalizing characteristic is suitable for normal driving on good roads but significantly reduces traction when driving on poor roads. 2. Limited-slip differential. When one drive wheel slips on a poor road, it can transfer torque to the drive wheel on a good road, utilizing the adhesion of this drive wheel to generate sufficient driving force. 3. Twin-worm differential. Its feature is the installation of two meshing worm gears inclined in the rotor. The shaft ends of the two worm gears are connected to the output shafts on both sides, either via gears or universal joints. The ring gear is installed on the rotor, and the entire assembly is fixed to the housing by bearings. The power source is input through the ring gear, and the output shafts on both sides deliver power.
When I was driving my Teana, I noticed that the noise from the differential bearing was particularly noticeable, like a continuous humming sound coming from the rear of the car, especially when accelerating or going uphill. It sounded like a low, muffled whirring. At first, I thought it might be tire noise, but it became clearer on the highway. The reason was likely due to wear on the bearing, causing uneven rotation, or insufficient lubrication, leading to dry friction between metal parts. After replacing the bearing at the repair shop, the noise disappeared immediately, and the issue was resolved. It's important to regularly check the fluid levels and not wait until the noise becomes too loud to address the problem, as it could affect the entire differential system, making repairs more expensive. Paying attention to such abnormalities while driving can help avoid the risk of breaking down on the road—safety first.
