Abstract: A gasket and a method for filling a wheel hub of a floating axle assembly with a lubricant. The gasket includes a sheet of a material suitable for sealing the lubricant in a cavity of the wheel hub when the gasket is mounted between the axle and wheel hub. The sheet has an inner opening and a retaining portion below the inner opening. The retaining portion is of a sufficient predetermined size to at least partially block the inner cavity of the wheel hub when the gasket is mounted to the wheel hub. The method of the present invention includes attaching the gasket to the wheel hub, filling the lower portion of the cavity of the wheel hub with a lubricant, the lubricant being held in the cavity by the retaining portion of the gasket, and assembling the axle to the wheel hub.