Tamiya TRF 416 24mm D Shape Differential Spacer by 3Racing 416-10A  [416-10A]

Diff spacer overview

This 24mm D-shape differential spacer is an RC-scale hop-up intended for use with the TRF 416 differential assembly. It provides a defined D-shaped contact to sit between differential components and is used to alter the spacing inside the diff case without changing gears or bearings.

Installation is straightforward for experienced model technicians: remove the diff housing, position the D-shape spacer in the intended slot or on the diff shaft where the original spacer sits, then reassemble the housing while checking for smooth rotation and correct mesh. Avoid forcing parts together; verify clearance by rotating the assembly by hand before final tightening.

From a tuning perspective the spacer's role is to change internal clearance and lateral positioning of diff elements, which can affect how the diff transfers torque and how the drivetrain feels under load. Use it as part of incremental setup changes and test on the track to assess handling differences.