Grease acts as a seal, shielding delicate bearings from road salt, dirt, and water.
At its simplest, axle grease is a thick, heavy lubricant designed to reduce friction between moving parts in your vehicle's axle assembly. Unlike engine oil, which is thin and flows freely, grease is "viscous"—it's designed to stay exactly where you put it, even under extreme pressure and heat. axle grease
If you're a DIY enthusiast, greasing your trailer or RV axle is a standard afternoon task. Here is the basic workflow: How to Grease a Trailer Axle - Lippert Grease acts as a seal, shielding delicate bearings