Tamiya DF-03 Rear Differential Shaft Heavy Duty DF03-03/HD by 3Racing  [DF03-03/HD]

Reduced-mass rear shaft for DF-03

This replacement rear differential shaft fits Tamiya DF-03 series cars, including Dark Impact variants, and is offered as part number DF03-03/HD for hop-up use.

The shaft is surface-machined to remove small amounts of material, lowering rotating mass while maintaining a heavy duty cross section for the rear differential assembly. That reduces inertial load on internal components without altering intended fitment.

Installation is a direct swap into the DF-03 rear differential carrier when replacing a worn or damaged shaft. Before reassembly check mating surfaces and 走珠軸承 for wear, apply appropriate differential grease to the gears, and confirm clearance and alignment during a short test run.

As a chassis-level hop-up this shaft does not change gear ratios but can affect transient response and wheelspin by slightly reducing rear rotating mass, so assess changes on the track and tune diff build and suspension settings accordingly.