Tamiya 51745 TRF421 Gear Differential Unit Set - Precision tuning for RC racers  [51745]

Fit the Tamiya 51745 gear differential to your TRF421 chassis

The Tamiya 51745 Gear Differential Unit Set provides the parts needed to maintain or upgrade the differential on a TRF421. The kit includes internal components so you can refresh worn parts or change your setup to suit different track demands.

Tune handling by changing oil viscosity

This gear differential gives you the option to alter oil viscosity to shift how the car behaves in corners. Running lighter oil helps free up the diff for quick steering on smooth surfaces, while heavier oil increases traction for slower, bumpy tracks.

Install front or rear to adjust balance

Designed for placement in either the front or rear of the TRF421, this unit lets you tweak weight distribution and drive characteristics. Swap locations to experiment with understeer and oversteer until you find the balance that suits your driving style.