The LubeLocker Differential Cover Gasket is available for those who are performing service to the differential, or if you're trying to repair a leak. This particular gasket has been designed for the Ford 8.8" and uses the latest technology by making a steel core gasket with a rubber coating to ensure a proper seal. One of LubeLockers best-featured ingredient is the elastomer beading that is applied to the gasket face. This beading will provide a dry, leak-free seal in a wide range of temperatures, power, or driving conditions. If you're performing maintenance to your Ford 8.8" differential, seal it right the first time with the LubeLocker Differential Cover Gasket.