More help may be found at the link below. Also I would caution you to remove the stick with the transmission in neutral. Don't mess with the pin, it is not a roll pin but two short alignment pins, once loosened they won't retighten correctly.
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=1047589#Post1047589