Tamiya TT-01 Differential Outer Join for TT-01 TYPE E - TT01-02 by 3Racing  [TT01-02]

Replacement outer join for TT-01 series

The TT01-02 Differential Outer Join is supplied as a spare for use on Tamiya TT-01 and TT-01 TYPE E drivetrains. It acts as the external coupling between the diff case and the driveshaft, intended to replace a worn or damaged outer join on the model.

Compatibility is restricted to the listed TT-01 variants, so check fitment against your chassis before fitting. Installation normally involves removing the diff cover, extracting the old outer join and fitting the new part while checking gear mesh and bearing alignment. No specialist workshop kit is required, but careful handling and light spline grease are advised.

In tuning terms, the outer join affects driveline alignment and can influence gearbox binding or free play. Renewing a tired outer join helps preserve consistent drivetrain response during regular driving and setup sessions.