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Black Diamond Gearboxes  Axles & Differentials +44(0)1925 416619 From Alfa Romeo to Volvo Front,  rear and 4 wheel drive gearboxes, including the latest DSG (Direct Shift Gearbox) 6, 7 and 8 speed gearboxes Gearboxes Our large stock of “BLACK DIAMOND EXCHANGE UNITS” mean that most  units can be delivered by courier the very next working day All BLACK DIAMOND remanufactured units are rebuilt using 100%  NEW BEARINGS, OIL SEALS and TOP QUALITY NEW PARTS as  required, supplied by some of the worlds leading manufacturers.