you might also try a bead of lock tite. I replaced mine when i did my clutch. and i smeared oil around the outside to ease instalation  what a mistake that was. the seal started to back out a few months later and eventual completly backed out to the point it almost fell off into the bell housing.  So i replaced it and used some locktite and i havent had a problem since.
98 csvt t-red.. sho-shop intake, b&m, fidanza, spec1 clutch, Torsen, DMD,optimized Y& TB, Brullen, rear strut bar,h&r's,17" konig traffik's.
"I say what I mean and I do what i say"
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