All of a sudden, and I mean really suddenly, my 87 244 won't change gears properly. There's been a large pile of firewood in my driveway that I've been working on this week and I may have backed over a piece. It was getting dark this evening when I did this and It didn't occur to me to have a look underneath until later. I drove the car and reverse was fine, but it was reluctant to shift up to second and third. No overdrive at all. The orange arrow is not lit. Is it possible that I knocked something off, like a cable? Any thoughts?

As always, thanx in advance for any help / Jim