if you are tuned, try re-tuning.. pay close attention to the transmission section of tuning, and see if there are solid communications.. it sounds like either your cruise module is whacked out or your TCM is hinting of it's passing.
A forum community dedicated to Ford Power Stroke owners and enthusiasts. Come join the discussion about diesel performance, modifications, EGR deletes, troubleshooting, lift kits, tires, wheels, maintenance, and more!