TAMIYA Hotshot/Super Hotshot/Boomerang/Bigwig Aluminum Rear Gear Box JR-THS13-LB by Jazrider  [JR-THS13-LB]

Machined aluminum rear gearbox for classic TAMIYA Hotshot models

The JR-THS13-LB aluminum rear gear box replaces the factory stamped plastic housing with a machined blue-anodized aluminum assembly, giving a firmer mounting surface for internal gears and bearings versus the original plastic part.

Role and fit: this rear gearbox housing positions the existing spur gear and pinion alignment inside the chassis rear section. Install it when you want reduced drivetrain flex under load or when testing alternate gear mesh and bearing setups.

Service and installation: the unit keeps the stock mounting footprint for the listed TAMIYA models so it mates to the original bolt pattern and internal layout. Internal access uses the same removable cover points as the factory housing, allowing routine inspection and bearing service without modifying primary chassis parts.

For builders chasing a tighter drivetrain feel and a more rigid gearbox mounting on classic TAMIYA Hotshot-series rigs, this aluminum rear housing offers a direct metal alternative that keeps the original layout intact.