A904 manual lever to manual valve ??

OK....can't find this anywhere and the tech manual isn't real clear. My push button trans was running fine when pulled for engine swap. All sorts of trouble after reinstalled including bad shift cable retainer spring. Had reverse only but found that manual lever had popped out of manual valve groove. Used screwdriver to gently push back up & in groove and reassembled. Ran fine one day after cable adjust one hole at a time. The next day I backed out of garage and no drive (or very little). Nursed it back in garage, disconnected shift cable at buttons & you can feel it shift thru all detents. Starts in "N", goes in "R" usually but no drive so I'm thinking lever is out of groove again. Before I pull pan again I'd like others opinions & does lever go above or below the manual valve?