Hazel

Hi ,I have a 2005 honda frv 2.2ictdi. I have had her since new with no real problems. Recently she has developed a high pitch squealing sound that appears to be coming from the rear of the car . It only seems to be present when turning right ,and only when going above 15 mph. It is both embarassing and concerning . She has had a new link arm at the rear that did not solve it. She has had new breaks fitted that has not solved it. 3 mechanics have charged me to "look " at her but not given any helpful answers other then could be break dust or grit Does any one have any idea what the cause could be as I am getting annoyed paying mechanics but not getting noise stopped