[JM 35 Sedan]

With all due respect to those who have already commented, It's difficult for me to see what those gear teeth actually look like, even with the resized pictures, due to the oil film, discoloration, and other particals of crud that appears to be on those gear teeth. If that cluster was cleaned up better, you might get a different verdict on replacement. You will always get some "lead in" wear on the first gear and cluster gear teeth on these early transmissions, but from what I can see on yours, that alone would not be a reason for replacement, IMHO.