★These gearbox joints are used when the TT-02 chassis is fitted with Item 53792 Assembly Universal Shaft (TT-01, TA04). ★Steel components help cut power loss and realize smooth motion.
TT-02 Chassis / TT-02D Chassis / BT-01 Chassis / TT-02FT Chassis: Use with 53792. TT-02B Chassis: Use with 53791. MB-01 Chassis: Use with 53597 or 42300.