Arrowmax am-210023 Silicone Diff Fluid 59ml 10,000cst  [am-210023]

Silicone diff fluid for R/C differentials

The Arrowmax am-210023 silicone diff fluid is a purpose-built R/C scale differential oil supplied in a 59ml bottle with a nominal viscosity of 10,000cst. It is formulated for use inside model differential housings to adjust traction bias and chassis balance without altering hardware geometry.

Compatibility is broadly with standard R/C differentials that accept silicone oil as the damping medium. The fluid's role is purely tuning: higher viscosity increases internal resistance and reduces differential action under acceleration or cornering, while lower viscosity allows freer differential behaviour.

Installation is a maintenance-level task on most hobby-grade differentials. Typical steps are to remove the differential from the gearbox, open the housing per your chassis service procedure, drain old oil, apply the recommended fill amount to the gears and spider assembly, then reassemble and verify smooth operation. Work on a clean bench and avoid introducing dirt or metal filings into the oil.

Tuning notes: use this 10,000cst grade when seeking a noticeably firmer diff feel without swapping internal components. Changes to diff oil will affect understeer/oversteer balance and can interact with tyre compound, suspension setup, and spur/pinion ratios, so adjust incrementally and test on-track.