I just purchased a 1998 Polaris Indy trail touring 488. Reverse just grinds, I took the drive chain housing apart expecting to see gears missing teeth. All the gears were good, the chain was fine, and the reverse gear would slide out and mesh with the smaller spur gear by hand. I put it back together and still the grinding noise and no reverse. I thought that maybe it could be that the cable was not pulling hard enough and not totally engaging the reverse gear. My father took a screw driver and pushed the reverse shifting lever on the case up till it wouldn't go further. started the sled up and still no reverse and the grinding noise. Any Suggestions On What Could Be The Problem????????????