TAMIYA Hotshot Series Aluminum Front Gearbox Upgrade - JR-THS12-RD by Jazrider  [JR-THS12-RD]

Heavy-duty aluminum front gearbox for Hotshot series

The JR-THS12-RD front gear box from Jazrider is a red aluminum replacement housing built for TAMIYA Hotshot, Super Hotshot, Boomerang and Bigwig chassis. It provides a metal alternative to the stock plastic housing for owners seeking greater durability and serviceability.

Install this housing when you need a robust swap that keeps the original internal arrangement while changing the enclosure material and color. The design accepts the same internal gear train and bearings used in the stock TAMIYA front assembly and functions as the structural casing for the front differential and associated drive components on the listed models.

Installation tips: remove the original gearbox, transfer spur and pinion alignment and bearings or spacers into the JR-THS12-RD housing, then verify gear mesh and shaft alignment before final tightening. Avoid over-torquing fasteners and make sure the gearbox turns freely across the steering arc to prevent binding with steering or suspension hardware.

For hobbyists maintaining the listed TAMIYA chassis who prefer metal housings for routine service and robustness, the JR-THS12-RD aluminum front gear box gives a direct-fit option without changing the internal layout.