Disclosed is a worm differential gearbox mechanism (100) for a vehicle. The worm differential gearbox mechanism (100) is enclosed in an outer casing (150). The worm differential gearbox mechanism (100) comprises a worm (20), a worm wheel (40), a first miter gear (60A), a second miter gear (60B), a third miter gear (80A) and a fourth miter gear (80B). The worm differential gearbox mechanism (100) is a compact design that offers greater reductions whilst still maintaining technical feasibility with respect to size. Figure 2