TAMIYA Front Gear Box Upgrade for Hotshot / Super Hotshot / Boomerang / Bigwig - JR-THS12-RD by Jazrider  [JR-THS12-RD]

Aluminium front gearbox tailored to Hotshot chassis

The JR-THS12-RD front gear box from Jazrider is an aluminium replacement housing intended for TAMIYA Hotshot, Super Hotshot, Boomerang and Bigwig models. Presented in red, the component swaps in for the factory housing to offer a tougher metal enclosure for the front differential.

Choose this aluminium housing when you want a direct-fit metal swap that keeps the factory internal layout while improving serviceability. It is designed to accept the original gear train and bearings used in the standard TAMIYA front gear assembly and serves as the structural cover for the front drive components on the listed chassis.

Fitting guidance: remove the stock front gearbox, transfer spur and pinion alignment plus any original bearings or spacers into the JR-THS12-RD housing, then verify gear mesh and shaft alignment before final tightening. Use measured torque on fasteners and ensure there is no binding across the steering range.

Ideal for modelers of the specified TAMIYA platforms who prefer metal housings for regular maintenance, the JR-THS12-RD aluminium front gear box provides a direct replacement option that retains the original internals while changing the enclosure material and finish.