Bearing balls are the rolling elements inside a ball bearing that support the differential carrier and allow it to rotate smoothly with minimal friction.
Their main functions are:
Reduce friction between rotating differential components.
Support radial and axial loads generated while driving and cornering.
Maintain proper alignment of the differential assembly for smooth power transmission to the rear wheels.
Worn or damaged bearing balls can cause humming, grinding, vibration, excessive play and premature differential wear.
