I've got this annoying high pitched hum coming from the engine bay on the tranny side. It's there when I idle and I can hear it resonating off of curbs while I'm driving. I know it's not the intake because I can hear that whistle too. This is more of a high pitch humming noise. Only things I have done are AEM CAI, SK2 SS, and I replaced tranny fluid with Redline about a month ago. I noticed the noise start not long after the fluid change.
Any suggestions would help. Thanks.