GPM Racing Aluminium Front Gear Box - 16pcs Set for Traxxas 1/10 TRX4 (TRX4012)

Precision aluminium front and rear gearbox housings for TRX4 installations

The TRX4012 aluminium gearbox set is a CNC-friendly replacement designed to reinforce front and rear gearbox mounting points on the TRAXXAS TRX4 platform. These machined housings are intended to stabilise suspension link geometry, provide solid C-hub attachment interfaces, and reduce chassis flex at critical diff mount areas without altering the stock gear ratios or driveline topology.

Constructed to replace the original plastic housings, the aluminium cases increase structural stiffness around differential zones and help maintain alignment under low-speed technical crawling loads. Installation workflow requires disassembly of the OEM front and rear gearbox shells, careful transfer of the internal gears and bearings, and reassembly using the factory driveline components. No motor, ESC, or servo modifications are required for fitment.

The package details supplied list included fasteners as follows: Stainless Steel Cap Head Screw 2.5×14 – 4 pcs, Stainless Steel Flat Head Screw 2.5×10 – 4 pcs, Stainless Steel Flat Head Screw 2.5×6 – 6 pcs. These components secure gearbox halves, link mounts, and C-hub attachments according to the supplier information.

Specifications

• Item TRAXXAS TRX4 Aluminium Front/Rear Gear Box – 1 set
• Material Aluminium
• Model Number TRX4012
• Compatibility TRAXXAS TRX4

Engineered for hobbyists seeking precision and reduced flex at diff mounting points, the TRX4012 gearbox housings deliver a robust aluminium alternative to stock shells and include the stainless fasteners listed for reassembly.

This item is compatible with

• TRAXXAS TRX4 Defender Trail Crawler

What inspection points should I use during assembly?

Check bearing seating depth, verify gear mesh clearances, and confirm link mount alignment before final torqueing of screws to ensure correct driveline geometry.

Are there recommended torque values for the stainless screws?

Use light, controlled torque appropriate for small stainless fasteners to avoid over-stressing threads in aluminium; hand tools with torque awareness are advised rather than high-torque power drivers.

Should I modify gear spacing after installing the aluminium housings?

The housings are dimensioned to accept OEM internal gears and bearings. Validate gear spacing during assembly and adjust shims only if necessary to restore correct mesh and smooth operation.

What maintenance practices suit aluminium gearbox housings?

Regularly check screw torque after early runs, inspect bearings for wear or movement, and maintain gear lubrication; aluminium housings benefit from routine inspections to preserve precise alignment. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.