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

This steel front gearbox joint fits the Tamiya M1025 Hummer scale chassis and is supplied as 1 piece. It replaces the plastic front joint inside the vehicle gearbox to improve durability where the original material commonly wears.

Fit and purpose: the component is a direct aftermarket replacement for the M1025 Hummer front gearbox joint and transmits power through the front gearbox to the driven wheels. It is intended for scale RC drivetrain use only, not for full-size vehicles.

Installation guidance: fitting requires disassembly of the front gearbox to remove the stock joint and install the steel unit. Use basic workshop tools and take care with gear alignment. Inspect bearings and set correct mesh during reassembly to avoid binding.

Tuning notes: a steel joint reduces elastic deformation and gives more consistent behaviour under load, which helps when testing front-end traction or different suspension setups. Check mating part wear and rotating clearances after installation.