Both the lim and uim gaskets were shot in my gt. the lower was shot before I got it (bought @ 113k) and the upper was replaced with a non-updated one before I got it. I replaced both with updated gaskets, found they "fixed" the lower by putting tons of silicone ALL over it (was a pain to scrape off/clean). Whats the best way to tell if the LIM gasket was replaced when I look at this car without actually opening everything up?