Like Bullet said, check your cables first. If the bushings are shot, clips are missing or the cable is bent it can prevent things from fully engaging. Another thing to check would be for a bent/broken clutch fork. If the clutch isn't disengaging or the cables aren't fully actuating the gears then you'll get the same symptoms.
Erik P. Official 2GNT thread Hijacker Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be... All we know is, He's not The Stig... But he is The Stig's Spartan cousin!