03 Polaris edge reverse????

Not sure I'm understanding the question. You're trying to push the sled? Or just spin the track by hand?

 Trying to push it it is set up for asphalt with wheels and the asphalt track trying to push it to stage , I race a drag bike wife wanted to race didn't want her on two wheels , so I know way more about dragbikes than I do about snowmobiles

Remove Drive belt raise the rear of the sled try and rotate the rear driven clutch. does the drive train rotate freely?? Obviously you have chain case apart to add a tar track to it did the chain case and gearing go back togther correctly?? Sounds like something is bound up

Yea removed belt nothing turns easily , after looking at diagram of parts inside chain case looks like the   Outside thrust washer on pinion gear is missing do not know if that would cause it not to roll or not, dont see this pinion on non reverse models , will order new washer see if that helps