When I can't get to a trans. bolt, I use a hella long extension (like 2-3 feet long), a swivel, and a ratchet. I feed the extension w/ the proper size socket on it from the back of the trans. up to the bolt. I usually just lay w/ my feet pointing towards the front of the car and my head up a bit so I can kinda see where I'm heading w/ the socket. Usually helps to have someone on the outside guide it near the bolt. This worked on the 96 Cougar I did. May be an easier way, but this is what worked for me.
These are highly engineered precision vehicles, the first step in diagnosing the problem is to strike the suspected offending part sharply and repeatedly with a blunt object, then re-test.