Are you still around? Thank you for taking the time to document this!!
I'm about to go into mine...after a deep-water incident my 5HP-19 is having issues. I like to do the work myself but stop at engine/transmission removal since I'm not equipped for that. If it turns out I need a TC or new transmission I'll have to seriously consider the cost vs the value of my 2002 325ci, so I figure WTH, I can at least drop the pan and rebuild the valve body. Your info will be invaluable I'm sure!