[ToonMan]

My 67 Chevy pickup has a 700r4 transmission in it. The day I test drove it the speedometer was not working. When I went to purchase the truck the speedometer was working. And then I took it for a drive last week and the speedometer was not working again. I contacted the previous owner and asked him what he had done. He had said that the cable had slipped out. I checked it and it was in and fine. So anybody have a suggestion on what I should look at next? Thank you