I would say the cable. but if your odometer is working then its got to be something inside the speedo body. If your in a big enough city you should have a shop that will work on speedos. If not then junkyard will be your best bet.
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93 Dakota Was 2wd 5.2 NOW 4X4 5.9RT 33x12.5 6in lift 1/4mile 15.259 85mph over 1ml el 14.2 sea lv. http://www.youtube.com/user/truck93 "No truck should ever be lowerd! NEVER"
Thanks for the help guys. I finally tore into the dash this weekend and fixed the speedometer.When the speedometer spun around, it stuckpointing straight down. Well,thetip of the speedo was hung on the plasticbevel and had just enough tension that it prevented the speedo from working.Took longer to remove the dash than it did to fix the problem!