Tamiya 84425 - Aluminum Lower Shell for TB Chassis  [84425]

Metal Lower Shell for TB-03, TB-04 and TB Evo.6

The Tamiya 84425 Aluminum Lower Gearbox replaces the original plastic lower piece on TB series cars to deliver better drivetrain efficiency and higher structural integrity. It is purpose-made for TB-03, TB-04 and TB Evo.6 models and gives a firmer platform for suspension attachments.

Why Fit an Aluminum Lower Gearbox

Aluminum reduces unwanted flex and improves the mounting surface for damper stays and upper mounts. The machined finish also helps resist wear compared with the standard plastic lower case.

Where It Works Best

Suitable for both front and rear installation on applicable TB chassis, this gearbox is a dependable upgrade for track time or spirited bashing. It helps keep drivetrain geometry stable across different surfaces.