TRAXXAS TRX-4 Center Gear Housing Upgrade - JR-TRX423-GU by Jazrider  [JR-TRX423-GU]

Traxxas TRX-4 Aluminum Center Gear Box (Gun Metal)
Price:
USD$34.84
Brand:
JAZRIDER
Model:
JR-TRX423-GU
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Aluminum center gear box designed for TRX-4 use

This aluminum center gear box is an RC-scale replacement intended for Traxxas TRX-4 chassis owners who want a gun metal finish and a more rigid mounting solution for the center drivetrain. It is offered as an aftermarket upgrade to help maintain precise gear alignment and to simplify maintenance access on scale and trail crawler builds.

The component is for model-level applications and its role is to secure the center gear train, provide a stable mounting surface for bearings and shafts, and resist deformation that can affect gear mesh during heavy crawling or trail driving. The gun metal finish provides a restrained appearance while protecting the aluminum surface from routine exposure.

Installation notes: confirm fitment points on the TRX-4 centre section, transfer any required bearings or seals from the original housing, and torque mounting screws to the chassis recommended values to avoid misalignment. Use thread locker where appropriate on metal-to-metal fasteners if the chassis setup is subject to heavy vibration.

Tuning role: the housing does not change gear ratios, but improving casing rigidity and alignment can reduce drivetrain lash and improve steering feedback and motor load consistency during slow-speed technical crawling.

Specifications

  • Item: Aluminum center gear box
  • Material: Aluminum, gun metal finish
  • Model Number: JR-TRX423-GU
  • Compatibility: TRX-4 scale and trail crawler

Compatibility

  • TRX-4

For builders seeking a metal centre housing with a subtle gun metal finish, this JR-TRX423-GU provides a direct replacement focused on alignment and easier servicing for TRX-4 based trail rigs.

Can I use the housing on modified TRX-4 drivetrains?

The housing is designed around TRX-4 geometry; minor drivetrain modifications may require additional checks for shaft alignment but major changes are uncommon.

Are there recommended torque settings for mounting screws?

Follow the chassis manufacturer's torque recommendations where available. Tighten progressively and check gear engagement after torquing to ensure proper mesh.

How often should the centre housing be inspected?

Inspect the housing and internal components after heavy runs or annually for general use; check bearing fit, fastener torque, and internal cleanliness.

Do I need to treat the finish to prevent oxidation?

The gun metal finish provides surface protection, but periodic cleaning and light corrosion prevention for exposed metal areas will help maintain appearance and longevity.