This Jazrider JR-THS12-RD front gear box is an RC-scale replacement housing made for TAMIYA Hotshot, Super Hotshot, Boomerang and Bigwig chassis. The housing is supplied in red and machined from aluminum to provide a durable metal alternative to the stock front gearbox.
The unit is suited to straightforward swaps where you want to move to metal components for maintenance or consolidation during a repair or upgrade. It is designed to accept the original internal gears and bearings used in the stock TAMIYA front gear assembly and functions as the enclosure for the front differential and related drive parts on the listed models.
Installation guidance: remove the original front gearbox, transfer spur and pinion alignment along with any bearings or spacers into the JR-THS12-RD housing, then check gear mesh and shaft alignment before tightening. Apply moderate torque to fasteners and confirm the gearbox rotates freely across steering travel to prevent binding.
For builders maintaining the specified TAMIYA chassis who want a metal housing for easier servicing, this JR-THS12-RD aluminum front gear box delivers a direct-fit replacement that preserves the original internal configuration.