Hi, would you happen to have a link of the video you put on YouTube about your sled whistling at idle and like a grinding noise?Mine is doing something similar and your video is no longer available.This is what you posted in 2013.« Here is a video of it.Watch the whole Video through.I would have taken the covers off but I was freezing and just ran out to take the video. https://www.youtube.com/watch?v=YqnjgILGbUU