Well, a little update. Had to do an oil change so we dropped the tranny pan at the same time. Not good.

Seems the fluid was burnt and couldn't tell from checking the dipstik. Clutches seem to be burnt up so probably a matter of time until I have to change out the tranny. Now how long it's been this way? Who knows. Maybe longer than I've owned the car. Either way, filter in it was nice clean actually, so we drained everything, put in some lucas and new fluid. Didn't have any issue with it at all driving home at all, but have to take it easy with it so it'll last a bit. Can't deal with replacing it right now.
At least I know where I stand with this at least.