Differential Side Bearing for Smooth Rear Drive ️

This precision side bearing supports the differential carrier inside the axle housing. It is needed to keep the ring gear and differential assembly perfectly aligned while the drivetrain sends torque to the wheels. When the bearing is healthy, it holds load in turns, reduces friction, and keeps gear mesh stable for quiet, efficient driving.

How It Works ⚙️

The bearing rides on the differential case and spins with it, carrying both radial and side loads created by acceleration and cornering. Correct support helps maintain backlash and contact pattern between ring and pinion, protecting gears from heat and abnormal wear.

Symptoms If It’s Worn or Broken

A failing side bearing can cause humming/whining that changes with speed, clunking on takeoff, vibration, or leaking gear oil from overheated seals. If ignored, it may lead to gear damage, metal contamination in oil, and in severe cases differential lock-up.

Why Replacing It Matters ✅

Fresh bearing support restores proper alignment, reduces noise, and helps the differential run cooler and last longer—especially on higher-mileage or performance-driven vehicles.

Compatibility

• Q70/M
• Q40/G Sedan
• Q50
• Qx50/Ex
• Qx70/Fx
• Q60/G Coupe
• M35/45
• Fx35/45
• G35
• G37 Sedan