I have a 1999 F250 Diesel, 2 wheel drive with 80K. Just recently the ABs light will not go off after it comes up immediately after startup. No codes come up when I checked them and Autozone checked them. The speedo does not work until I am in second gear around 2K rpm, then it jumps up and performs fine until I drop below that and it drops down to 0. Cruise control does not work anymore. The Overdrive light is blinking. The transmission shifts fine and has full fluid. All of it seems related, is this a VSS issue? Need help quick as this truck will be towing hurricane assistance trailer to Mississppi in 9 days. Thanks

 

Replace VSS, it's rather cheap.

 

Yep speed sensor

 

Yep, VSS it is! Cheap, easy fix.... just too bad that it's a fairly common failure item.