This is an optional RC4WD AX2 2-Speed Transmission. This transmission is a direct fit in the Axial Wraith, and SCX10 trucks, but short wheel base (SWH = 11.5") SCX10 trucks will require relocation of the battery tray or ESC box, and the Wraith will require you remove the shifters from the interior.
This should have a steel Spur. It should come with a Spur cover . I bought a aftermarket motor mount and cover . I had to modify it to fit the trans case .