Title says the problem, resealed the T case, held for a few months and am still getting leaks from it at a similar rate any suggestions?

 

Make sure the vent isn't clogged? Did you put thread sealer on the bolts that require it?

 

Did you take the Tcase out and reseal all the gaskets? What failed? X2 on vent plugged.

 

I had a plugged vent (melted), which seems to be pretty common. Get a piece of 1/4 ID hose which can be connected to the end of the vent line in the engine compartment. Try to blow air in with your mouth, there should be no resistance until some pressure builds up (like blowing up an air balloon), then release the end and some decent amount of air should be coming out quickly.