I have a 2008 Case DX35 that has developed a hydraulic squeal. It seem to be coming from the left side of the engine around the hydraulic filter but it is hard to isolate since it only does it when the tractor is in motion. I have replaced both filters and the issue has not improved. I can operate the front end loader without the squeal but it is slower than normal as well as the rear lift. The steering is also slow. If you have had this issue before let me know what the resolution was.