Other users spotted it, I'm just sharing my experience that mine was setup similar to yours and despite my fixing it minutes after I bought it, the trans did not survive. I hope you have better luck.
The linkage to the trans controls the line pressure. If that linkage doesn't move right, then the lown pressure will cause the clutches in the trans to slip during shifts (or even during driving) and will wear them rapidly. Eventually they fail. In my case it was effectively stuck in 1st and I found out when I tried to reverse out of the shop and drove into a workbench instead. Yay.