Need help on speedometer cable, 87 R10 700r4

[UATahoe]

Speedometer quit working a few days back. Got it in at the transmission shop because there were some other issues that needed to be ironed out on my 700r4 rebuild. They can play with the cable a little and get the speedo to work for about a mile then it quits again. I am hoping its just the speedo cable.

Are these 2 piece cables or 1 piece? They havent checked yet and i am needing to go out and find a replacement. Truck has cruise control. Any help would be awesome. Hate that they have to tear in to the dash but it its what it is. Thanks guys!