Tamiya 84381 Track Edition Steel Rear Shaft & Diff Housing  [84381]

Track-Focused Tamiya 84381 Steel Rear Shaft

The Tamiya 84381 Steel Rear Shaft and Differential Housing is a practical upgrade for drivers wanting sharper drivetrain performance on F104 or TRF101 chassis. It replaces the original kit parts to improve rotational smoothness and cut drivetrain inefficiency.

Traction Gains from Extra Mass

Manufactured from heavy-duty steel, this rear shaft and diff housing weighs 9 grams more than carbon equivalents, which helps boost traction on low-grip circuits. That additional weight contributes to steadier rear traction during braking and corner exit.

Compatibility, Pairings and Notes

This part fits F104, F104 Ver.II, TRF101, and TRF101W chassis models. It is recommended to pair it with the Tamiya 84380 Carbon Rear Shaft & Diff Housing Set for a full upgrade. Be aware that Diff Housing A and the specific elements from item 84380 are required to complete the build.