trans to extention housing : honestly don't know if there's a seal/gasket there or not.
extention housing to tcase : factory there's a paper gasket or plastic gasket(don't remember which) in between the two. No clue why? because there's a drain in the extention housing at the bottom. When i put the tcase back in, its bare between the case and extention housing.
is that wrong? I'm just wondering.