WD45 stuck in reverse

It may not be a big deal. I would pull the tower and look at the wear on the ball on of the shifter.

That's a great video. For a novice repairman, he caught on pretty quickly as to what the problem was.

That's kind of how it begins. The one time you get in a little bit of a hurry to shift gears, and the tip of the shift lever will become disjointed, due to worn parts. Not just one part, but five.  The tip of the shift lever is number 1. The square slots for each of the three shifter lugs down inside are number 2.  The bottom of the gear shift pivot ball is number 3. The socket for the ball in the shift cover is number 4. And lastly, the square pins, their holes and grooves that keep the gear shift lever from twisting in the socket is number 5. All these areas wear a little bit each and every time the tractor is shifted in or out of gear. When the D-17 came out, the engineers must have heard enough negative feedback from Dealers/customers to address these areas, because you just don't ever work on D-series and newer. The parts were improved for near zero wear in these areas. In the WD-series the change made from the straight stick to the easy to reach curved stick actually created a problem, as many of you know, due to twisting of the lever. That's when the square head pivot pins were now available oversized and they went from one pin on the left to twin pins, one on each side. Good luck figuring out which area is worn and causing issues on yours. Chances are if you get the shift lever back in place, careful and cautious gear changing will get you by for a while yet, especially if this was the first time for failure.

Thank you all for the advice. This tractor is relatively new to me, as in I got it from a relative who fixed nothing. I repaired a hole in the oil pan caused by #2 connecting rod suddenly becoming 3 pieces on him. I fixed all of that and put some paint on her, am enjoying getting some work out of it but finding other things along the way that were also never fixed, relatively speaking. It has been a ride and slowly becoming a reliable part of our farm. I will post back to let everyone know what I find once I look deeper.