What is the specific cause of abnormal noise in the drive axle?

What is the specific cause of abnormal noise in the drive axle?

Abnormal noise in the drive axle is a common problem in the automobile transmission system, which may be caused by many reasons. Here are some specific reasons:

1. Gear problems:
Improper gear meshing clearance: Too large or too small meshing clearance of conical and cylindrical master and driven gears, planetary gears, and half-axle gears may cause abnormal noise
Gear wear or damage: Long-term use causes gear tooth surface wear and increased tooth side clearance, resulting in abnormal noise
Poor gear meshing: Poor meshing of master and driven bevel gears, uneven meshing clearance of conical and cylindrical master and driven gears, gear tooth surface damage or broken gear teeth

2. Bearing problems:
Bearing wear or damage: Bearings will wear and fatigue when working under alternating loads, and poor lubrication will accelerate damage and produce vibration noise
Improper preload: Active bevel gear bearing is loose, active cylindrical gear bearing is loose, and differential tapered roller bearing is loose

3. Differential problems:
Differential component wear: Planetary gears and half-axle gears are worn or broken, and differential cross shaft journals are worn
Differential assembly problems: Planetary gears and half-axles Gear mismatch, resulting in poor meshing; planetary gear support washers are worn thin; planetary gears and differential cross shafts are stuck or improperly assembled

4. Lubricant problem:
Insufficient or deteriorated lubricant: Lack of sufficient lubrication or poor lubricant quality will increase component wear and produce abnormal noise

5. Connecting component problem:
Loose connecting component: Loose fastening rivets between the reducer driven gear and the differential case
Wear connecting component: Loose fit between the half-axle gear spline groove and the half-axle

6. Wheel bearing problem:
Wheel bearing damage: Loose outer ring of the bearing, foreign matter in the brake drum, broken wheel rim, excessive wear of the wheel rim bolt hole, loose rim fixation, etc. can also cause abnormal noise in the drive axle

7. Structural design problem:
Insufficient structural design rigidity: Insufficient rigidity of the drive axle structure design leads to deformation of the gear under load, and coupling of the drive axle housing mode with the gear meshing frequency

These reasons may cause abnormal noise in the drive axle during driving. Solving these problems usually requires professional diagnosis and repair, including checking and adjusting gear clearance, replacing worn or damaged parts, ensuring that lubricants are sufficient and of qualified quality, and checking and reinforcing connecting parts. Through these measures, abnormal noise from the drive axle can be effectively reduced or eliminated, and the normal driving performance of the car can be restored.