9 Removable carrier differentials struggle more with leakage than any other type. The key to a leak-proof union is surface inspection. Carrier and housing contact surfaces must be clean and free of scoring. Studs should be removed, thoroughly cleaned, and reinstalled using The Right Stuff between the stud and housing. Then apply a very thin film of The Right Stuff between the gasket and housing and carrier. If sealer oozes out, you’re using too much.