How do you fix oil leak rear axcle on Toyota t100?

To fix an oil leak at the rear axle on a Toyota T100, start by identifying the source of the leak, typically the axle seals or differential cover. Drain the differential fluid, remove the affected axle shaft, and replace the axle seals if they are worn or damaged. If the differential cover is leaking, replace the gasket and reseal it with a suitable gasket maker. Finally, refill the differential with the appropriate fluid and check for leaks before test driving the vehicle.