TRF 416 Differential Spring Compatible with TAMIYA for Preload Adjustment 416-10C by 3Racing  [416-10C]

Overview of the TRF 416 Differential Spring

The 3Racing spring is a direct-replacement part for TRF 416 differential assemblies, acting as the internal preload spring that influences how power is split between wheels. It is suited for precise tuning in scale 1/10 touring setups.

Installation is straightforward: remove the diff case on your TRF 416, replace the factory spring with the 416-10C unit, then reinstall the original shims and bearings. No specialist tools are required beyond standard RC toolkits.

In tuning terms, this spring establishes the baseline preload before you select diff oil or modify clutch plates. A firmer spring increases initial preload and reduces light-throttle slip, while a softer spring allows more differential action. Adjust gradually during track testing to refine turn-in, mid-corner grip and throttle feel.