I `ve always seemed to have an issue with rear main seals and pan gaskets leaking on my Crate 360 short block. Last week I went to my local Dodge dealer and bought a new rear main seal and one piece pan gasket and installed it with Right stuff. I`m putting the trans in this weekend so I can start it and check for leaks. We`ve always used Fel Pro gaskets with the pan rail and end gaskets being seperate, I like the Mopar one piece setup we`ll see how it holds up.