Side Differential Oil Seal for Nissan Trucks

This side axle oil seal keeps your rear differential clean, quiet, and leak-free. Mounted at the output side of the carrier where the axle shaft exits, it traps gear oil inside and blocks mud, dust, and water from entering. Built with a steel shell and a spring-loaded elastomer lip for long, stable sealing under heat and road vibration.

Why you need it

• Maintains correct GL-5 gear oil level for gears and bearings
• Prevents leaks soaking brakes and driveway
• Protects side bearings and spider gears from wear

How it works ⚙️

The primary lip hugs the axle journal and rides on a thin oil film, while a garter spring applies uniform tension. Dust lip shields against grit. The press-fit shell locks in the housing bore; correct depth keeps the lip on the polished running surface for a positive seal at all speeds.

What happens if it fails ❗

• Oil on backing plate or wheel, smoky smell after drives
• Low fluid causes humming on cruise, whine on load
• Contamination leads to bearing pitting and ring-and-pinion damage

Ignoring a torn or hardened seal can drain the diff, overheat bearings, and chip gears—turning a small repair into a full rebuild.

Tech tips

• Inspect and polish the axle journal; sleeve if grooved
• Lightly oil the lip; install square with a seal driver
• Torque fasteners to spec and refill to proper level

Compatibility

• Navara
• Titan
• Frontier
• Xterra