Rolls forward in neutral, locks up rolling backwards??

and a friend who likes the feeling of ATF sliding between his fingers
Who doesn't love that??

Thanks, that's a pretty good step-by-step. Luckily, I haven't connected too many things to the engine, so there won't be much to disconnect or remove. There also isn't any fluid in the trans, because I just got done changing the filter and gasket. Should be pretty easy.