I have a BAII xr6t speed manual that has now done just over 60000 k's. Recently an odd noise has developed which occurs at about 2000rpm upwards. if you can imagine the sound you'd expect to hear if you had a leaky manifold gasket that's pretty much it. Also now there is turbo flutter on almost every gear change since the noise begun. Ford checked it out on my last service and could not find a problem. Any ideas ?.....Mike.