06 900 RMK, grinding noise in reverse, no power

I have a huge head ache over this. My 900 RMK has SLP intake, pipe, can, head, a ton of vents, V-force 3 Reads, and a few other things. When i put the sled in reverse it makes a terrible grinding noise and has absolutely no power to reverse. I notice this a few times and didn't think much of it. I thought it was just ice build up after riding through some open water when i hade to cross a crick.

Well i parked on top of a bridge and i was going to jump off. Forgetting about the grinding problem, i pressed the magical yellow button and hit the throttle and nothing. No power in reverse at all and it grinded really bad. So i pressed the yellow button again and when i gassed the sled to jump off the bridge it grinded again and nothing. So i pulled the panels off and let it cool down. After sitting there for 30 min i started it again and it ran amazing. When i got home the sled went into reverse fine and ran great!

So i am up high in the mountains today and my friend gets stuck right behind me. To turn my sled around in the narrow road i would need to ride a long ways so i turned side ways, put it in reverse and it grinded again. so i hit the kill switch and started it again with no grinding??????????????????????????????????????????


anyone have any ideas?

Also i have the engine code SERuCE coming up.

Under me....lol its coming from the drive train and i don't want to mess anything up playing with it, but i also don't want to drive 55 miles to my dealer mechanic through yellowstone park driving 45 mph just to have it be something stupid. My thought is that the spring that engages the clutch in reverse isn't catching or i could have a broken spring. The original owner of the sled told me that those could be it.

To me, it almost sounds like something is messed up with the drive chain and or sprockets???

I have no idea. I bought the sled on Friday. Later to day i am going to cal up our dealer and see what he thinks. I am going to be working on it tonight so I can check all of that.

It makes the noise once i hit the throttle but like i said, some times it doesn't do it and once it did it trying to go forward right after it did it in reverse.

what about the engine code that keeps coming up? its SERuCE