Thanks for pointing out things to look for and how to adjust. After the holiday I will get under and do some serious looking.
Horror story told by a trans guy I spoke with.
Your Internal linkage is worn, close to failing resulting in no forward or reverse motion.
22 yr. old truck, get rid of it. In the meantime he's looking at his calendar, I have an openning in two weeks, about $350-$550 should fix it, plus fluid, filter, flush, lunch, snacks, wine for dinner... on and on. Fom this I sure can pull the pan take a look at the internal link and maybe see what if any is the problem. "Get rid of it" with that attitude where would I be with the 1948?