I'm getting the same sound. I'm posativer it is my alternator starting to go. The battery light flashing once I hit 6,000rpm also might be a safe assumption that it my problem .

Aaron

AKA NVS SVT 98.5 Silver/Blue SVT#4553 Yeah it's modded 98 T-Red/Blue SVT Contour Totaled 06/05/06 03 3L,VCN 2000,CAT Cams,MSDS Headers w/Y-Pipe,XCal2 and lots more