went to the dealer today and had it checked out, bearing in chancase was the problem and the other one worn so they replaced that one as well. speedo was still working. so far this season that's bearing slide rail and slide on 2400 mi. never had to replace a drive shaft bearing in either one of the polaris sleds that I owned. Yamaha should look at putting bearings that can be greased. ( sqeaky wheels get the grease) Other than that thou I really like the sled , well the engine anyhow.... enough to buy another yammy....