Mugen Seiki MTX-4 Aluminium Rear Differential Housing by 3Racing MTX4-32/TI  [MTX4-32/TI]

Rear differential housing for MTX-4

This aluminium rear differential housing is a direct-scale replacement part intended for use with Mugen Seiki MTX-4 chassis assemblies. Manufactured by 3Racing under part MTX4-32/TI, the component focuses on replacing the stock housing with a stiffer, CNC-machined aluminium unit to support rear drivetrain consistency during setup and track use.

Use this housing where chassis rigidity and consistent differential alignment matter for handling and gear mesh stability. The housing serves as the mechanical mount for the rear differential assembly and interfaces with bearings, output cups, and the rear gearbox of MTX-4 layouts; installers should verify bearing seat fit and clearance before final assembly.

When tuning, this aluminium housing helps maintain gear alignment under higher loads compared with some stock materials, which can aid repeatable setup changes. It does not alter gear ratios or differential internals, so tuning still relies on the chosen diff components and oil weights.

Choose this housing if you need a durable aluminium replacement for the MTX-4 rear diff mounting, keeping in mind it replaces only the housing and should be paired with compatible bearings and differential internals during assembly.