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

Precision aluminum front gear box for Tamiya racers

The JR-THS12-RD front gear box from Jazrider is an aluminum replacement housing designed specifically for TAMIYA Hotshot, Super Hotshot, Boomerang and Bigwig chassis. Supplied in red, the unit replaces the plastic front gearbox with a sturdy metal enclosure for hobbyists who prefer enhanced durability.

Use this housing when you want a straightforward metal swap for easier maintenance or when consolidating front-end parts during a repair. It accepts the same internal gear set and bearings as the original TAMIYA front gear assembly, acting as the protective shell for the front differential and drive components on the listed models.

For installation, remove the factory front gearbox, move over the spur and pinion alignment and any original bearings or spacers into the JR-THS12-RD housing, then check gear mesh and shaft alignment before final assembly. Maintain moderate torque on fasteners and confirm there is no binding through full steering travel.

For modelers working on the named TAMIYA platforms who want a metal housing for routine servicing, this JR-THS12-RD aluminum front gear box offers a direct-fit alternative while keeping the original internal layout intact.