iLOVEthatEMone

I just recently put a new long block in my car and my car was running fine for about a week. But then all of the sudden my axle keeps popping out of my tranny on the passenger side and i also just put new axles in. it popped out once before then the next day i got new ones put them in and they popped out later that night. So my question is WHAT IS MY PROBLEM? could it be my mounts for the block? i had innovative mounts with my b16. Or could it be my differential? PLEASE HELP OR GIVE ME ANY FEEDBACK POSSIBLE! THANKS!!!!