How do you stop a rear diff seal leak on an x 300 jaguar?

To stop a rear differential seal leak on an X300 Jaguar, first, you need to identify the source of the leak and clean the area thoroughly to remove any dirt and oil. Next, you may need to replace the worn or damaged seal by draining the differential fluid, removing the axle flange, and replacing the seal. After installing the new seal, reassemble the components and refill the differential with the appropriate fluid. Finally, monitor the area for any further leaks after the repair.