is my ppf screwed?
 

just recently i started to hear this cracking/creeking sound under my car, it's near the tranny area. I think the onlything that could cause it is the ppf cracking?

the weird thing is when I first start driving the car, the sound wouldn't be there, after driven for about 5-10 miles, the sound would come back, it's very audible when I go into a parkinglot (uneven surface?)

any ideas guys? could a bad diffrential bushing do the same thing?

You might want to see if the cat heat shield has a crack(s) in it. Mine does and I get a nice loud buzz as I pass through 1500 rpm. Just been too busy to take it to an exhaust shop to weld it back together.