A 904 in heaven- unusual failure

my trany guy put a shift kit and some other mods to my 904 on my pick up awesome shifts but i some how twisted the whole case in half! dont know how that happenened, he asked me if i was doing trany drops, i didn't even know what they were untill he told me. and i dont think i'll ever try one either but i've been scared of the 904 after that