strange S60-AWD problem Topic is solved

[Guest]

A few months ago I went over a speedbump in my S60 and immediately, an ear-piercing whistle came from somewhere underneath the car. It had to be towed, and the dealer made a repair to the flange protecting the driveshaft. Unfortunately, now whenever I drive at highway speeds in wet weather, the whistle comes back intermittently. It seems to be coming from the center bottom of the car. My mechanic is out of ideas -- does anyone know what this might be?