any chance you have tried rocking the truck back and forth to get it out of gear.
the input shaft is 4th gear... you could also have a shift fork issue, shifter issues, clutch...??? How does the clutch pedal feel right now?
A forum community dedicated to all diesel truck owners and enthusiasts. Come join the discussion about Powerstroke, Cummins and Duramax performance, modifications, classifieds, troubleshooting, maintenance, and more!