Use as spare parts for the TT-02BR chassis, or as replacements for differential cup joints when using Item 22049 XV-02/TT-02 Oil Gear Differential Unit on the TT-02B chassis. - TT-02BR Gearbox Joints x2 - Compatible with TT-02BR (Item 58717) or TT-02B chassis cars. - NOTE: When using TT-02B chassis, use Items 22049 (XV-02/TT-02 Oil Gear Differential Unit) and 53791 (DF- 02 Assembly Universal Shaft). - Can be used either front or rear. (Two sets are needed for full setup.)