These two steel gear box joints are offered as a 2-piece set for RC Tamiya 4WDs and act as direct replacements for typical gearbox coupling points. They are intended to enhance drivetrain durability where original plastic couplers might fail.
Recommended use: replace worn couplers found during maintenance inspections or fit them as a preventative upgrade before regular off-road or trail use. The steel build focuses on longevity while preserving the original mounting interfaces so vehicle geometry and handling remain unchanged.
Fitting guide: remove the gearbox cover and the old coupler, install the steel joint into the original seat, check mesh and clearances, then reassemble the gearbox. After installation rotate the drivetrain and tweak gear mesh if required. These joints are for model-level repairs and tuning and do not alter suspension or motor mounting geometry.
Tamiya 9808129
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