List all linkage parts for wiper and transmission armature

Ok, The part that sticks out of the transmission is called the shift shaft, and the nut that holds the shifting linkage onto the shift shaft would just be a linkage retaining nut. The easiest way to identify hard to find parts is to visit the dealership or their website. Most manufacturers will put up diagrams of the assembly with all of the individual parts listed on the diagram. If it is just a mechanical component you could just buy the assembly used.