I'm puzzled???

mity2

I like Pro3 and all I got was this crappy CT.
Jul 24, 2003
2,872
3
48
StateCollege PA
My GT has developped some funky rattle this past few days. most likely some sort of resonance It seem to occure almost for certain when I fire her up for the first time for sure. And after she is wormed up, randamly, but always at around 1600RPM to 2000RPM.
Usually happens as rev is comming down. both while moving and while I'm not moving. Wierdest part of it that I can feel it on my brake pedal while pushing down on it. Its moving the entire pedal assembly. Pretty badly. So i know its something to do with brakes. I looked under the dash, looking up the entire brake assembly(there isn't much there), and nothing is loose, or possibly moving. And nothing loose on brake booster side either. So what should I check? Any idea???

P.S. I love my exhaust set up. But this is geeting on my nerve, as making it almost impossible to keep reving my car in my garage as my neigbor is not too kinds to loud ass car reving 100 times on night, which seems only time I have :bang: ...