not to hijack this thread or anything, but I have a new rebuild with a new front case / pump & new oil filter housing, new gaskets used everywhere all with proper torque specs and for some reason I have a small oil leak what appears to be the front case crakshaft seal, only when running and when the oil gets warm..
how could this happen

Oil should be used around the seal before installation correct? like I said all new gaskets where used but it's hard to belive it came bad from the factory.