I posted this in the tranny section and hadn't found any help yet, but there was another person having the same problem. I'm hooking up my speedo cable in my 67 and it appears that either the cable end or the gearing is wrong. I took out a th350 and puttin in a th400. Rick's First Generation says I have the right cable. The th400 is out of a 68 Chevelle. The square cable end turns inside the square gear. Is there an adapter or fitting to make this work? Could the gear be worn out?