TRF421X Internal Gear Differential - Tamiya 51767  [51767]

TRF421X internal gear differential

This gear differential unit set acts as the internal differential assembly for TRF421X-based 1/10 touring cars. The gear-type design manages torque distribution between driven wheels to support consistent handling characteristics.

The unit is intended for maintenance and setup work: replace the differential when wear impairs handling, or swap it as part of setup changes to influence balance. Installation requires centre gearbox removal and careful attention to gear mesh and bearing seating for reliable performance.

When fitting this assembly, check adjacent bearings and the spur/pinion interface for wear, and verify gearbox torque screw settings to avoid undesired preload on the differential. Apply standard RC workshop procedures and correct tools for secure installation.

As a direct spare for TRF421X 1/10 touring cars, this differential unit is useful for restoring drivetrain performance or modifying differential behaviour during setup work.