Arrowmax am-210033 59ml Silicone Diff Fluid 300000cst  [am-210033]

High-viscosity silicone oil for RC diffs

Arrowmax am-210033 is a 59ml bottle of silicone differential fluid specified at 300000cst for use in hobby-grade RC differential units. This product is intended as a direct-fill option for scale differentials where enthusiasts adjust damping to tune handling characteristics. The description treats the item only as an RC accessory and does not imply any real-vehicle application.

The fluid’s primary role is to alter internal differential damping. Higher viscosity raises internal resistance between gear elements or ball differentials, producing a firmer diff feel and changing cornering and traction behaviour on carpet and hard surfaces. Lower viscosity lets the diff act more freely.

Installation is straightforward for those familiar with differential service: drain the old fluid, clean internals as needed, then refill following the differential maker’s recommended volume and procedure. Because diff designs vary between manufacturers and models, always follow the chassis or diff kit instructions for fill amount and assembly sequence.

When tuning, increase or decrease viscosity in small increments and test on the same surface to judge effects. Keep a setup log of viscosity values and handling notes to refine your settings. Store the bottle upright and secure the cap after use to avoid contamination and evaporation.