For Fiat 500 gear boxes we have a lock differential include a set of axles.
More info see
newbielink:http://www.FiatClassic.com/Bilder/B6456.JPG [nonactive]
newbielink:http://www.FiatClassic.com/Bilder/B6456.GIF [nonactive]
or give me a call 0049-4385-599800