I do not think it would be the belt guard because if I lock up the track with the brake while moving along the squeaking noise stops completely. It is kind of a rubbing, squeaking sound, but I can not feel any vibration on the sled. Also, if I have it on a stand it will not make the noise. This...
I have a 2008 800 Crossfire SnoPro with 940 miles on it and it has been squeaking when coasting for the last while. I have changed the diamond drive oil and it looked clear, but had some tiny flakes of metal shavings in it. (you could see specks with a flashlight shining on the oil as it drained...