tony,
Does the truck grind with the engine running and trying to jam it into gear without pushing in the clutch? Clutches don't usually get stuck away from the flywheel. They usually get stuck to it. On the transmission, there are 2 levers on the side that should have 2 rods which come from the shifter box on the steering column. Are all these rods attached? It's possible that you are shifting the column shifter, but it isn't hooked up to the transmission properly.