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

Overview of the D-shape spacer

This 24mm D-shape differential spacer is an RC upgrade intended to work with the TRF 416 differential assembly. It provides a D-shaped seating surface to alter spacing inside the diff case without replacing gears or bearings.

Fitting requires basic diff service skills: split the diff housing, seat the D-shape spacer where the factory spacer sits or onto the diff shaft, then reassemble and hand-check for smooth rotation and correct mesh. Avoid forcing the components; confirm clearance and free movement before tightening fasteners.

From a setup standpoint the spacer changes internal clearance and lateral alignment of diff parts, which can affect torque distribution and drivetrain responsiveness. Use it as part of measured setup changes and evaluate on consistent surfaces to understand handling impacts.