is that wastegate whistle after shifting? how about i do this, change the fuel filters.. the primary WAS NEVER EVER CHANGED NEVER. and i do that diesel purge, and that banjo bolt clean thing. if i dont notice anything i will do the valve adjustment, and if that dont work ill do the injectors.

and if that is the wastegate that whistles after shifts and im not dumb thats not a turbo whistle im hearing