I've looked through most of the threads and I haven't seen this issue. I have a 2007 500 HO and there is a terrible squealing coming from the pull cord area. It happens when it is warm and running on level ground. not when climbing or descending. I've checked the output bearing and it looks good. I don't have any play in the drive line at either end so I am assuming it is coming from inside the cover to the pull cord. Does anyone else have this anomoly?