Tamiya M1025 Hummer Steel Front Gear Box Joint by GPM HM1041SF  [HM1041SF]

This steel front gear box joint is produced by GPM for use with the Tamiya M1025 Hummer scale platform. Supplied as 1 pcs, the part replaces the front joint inside the vehicle's front gearbox assembly and is intended to increase durability where plastic components typically wear.

Design role and fit: the component is a direct aftermarket replacement for the M1025 Hummer front gearbox joint. It is intended for use in scale RC drivetrain assemblies where the front joint transmits power through the gearbox to the front wheels. Do not use this part on full-size vehicles.

Installation notes: installation requires disassembly of the front gearbox to remove the existing joint and fit the steel unit in its place. Basic workshop tools and care for gear alignment are recommended. Check mesh and bearing condition during reassembly to maintain smooth operation and avoid introducing drivetrain bind.

Tuning role: swapping to a steel joint can reduce deformation and improve repeatable behaviour under load, which is useful when adjusting front-end traction or testing different suspension setups. Expect a change in wear characteristics compared with plastic joints, and verify rotating clearances after installation.