My blower makes a noise in 1st & 2nd that sounds like it is coming from the transmission but is in fact the supercharger. The noise seems to be transmitted through the driveline.
Fred K.
had my transmission replaced because the TOB wore against the TOB retainer sleeve and caused the sleeve to break. not a servicable part from what Ford has said. so they replaced the whole tranny.
You will find a plethora of threads about the TOB here.
Here is a thread that offers a solution to fixing the retainer sleeve if it should go break...