Exhaust was making a squealing noise near catback

[Noodles]

it would squeal louder as i revved higher, than when i hit a certain rpm it would dissapear than come back when it got to the lower rpms...

i turned off car, restarted it.. still there

i was very worried.. so i drove it around a few blocks. than it dissapeared...

turned off car, turned on car.. no trace of it.

any clues?

[JL8Jeff]

Pipes or clamps are loose when cold and after warming up they expand no longer rattle or squeak. Take a look at your exhaust hangers around the gas tank area, they can rub on the metal if the rubber mounts slide back a little.