2002 660 Grizzly. Removed clutch, cleaned, re greased and installed with new belt. Test ride no problems. Rode onto trailer for transport, and placed shifter into park. Still no problems. Arrived at trails, shifter moves through all gears with the associated dash lights working, however, will not engage, as if in neutral. Shifter moved through all the gears many, many times as well as rocking it back and forth in gears, holding brakes, etc. All the basic stuff. Before I disassemble again any ideas?