Tamiya 84381 F104 Steel Rear Shaft & Differential Housing Upgrade  [84381]

Tamiya 84381 Steel Rear Shaft for Smoother Drivetrain

The Tamiya 84381 Steel Rear Shaft and Differential Housing is an effective upgrade for hobbyists wanting to sharpen the performance of F104 or TRF101 chassis cars. This precision part replaces the kit items to deliver smoother rotation and cut drivetrain losses for cleaner power transfer.

Weighted Build for Improved Traction

Made from durable steel, this rear shaft and diff housing is 9 grams heavier than the carbon versions, which helps increase traction on low-grip surfaces. The extra mass assists stability in corners and under throttle, making it useful for track setups that need predictable balance.

Fitment Notes and Installation Advice

This steel shaft fits F104, F104 Ver.II, TRF101, and TRF101W chassis models. For best results pair it with the Tamiya 84380 Carbon Rear Shaft & Diff Housing Set. Remember that Diff Housing A and the associated components from item 84380 are required to complete the installation.