09 M1000 reverse ?

last two rides have been deep powder days! reverse works fine unloading and on hard pack. But in powder and off trail the helix on the driven is not locking in the notch, and the sheaves are open with no belt tension and also makes loud ratcheting to grinding noise. had DD apart between rides all looks good there. Also when shifting to forward the grind noise was present, unloaded the track and spun, and was back to good and finished the day. But i'm concerned about failure. Still new to cat and appreciate all help thanks!

Stock driven, rollers end up just above the notch in the helix. Has happened after a stick and just falling off sled and coasting to a stop and trying to backup to bust thru the wall of snow I was pushing. 3Ft. Plus Great days at the Ears/Buff pass.

Just read similar post M1000 no reverse.sounds like it's just a cat thing and with care can get better results, just hate the Razz from the doo boys! Need to learn how to use search better, exactly the same posts
.Thanks