2nd time posting..need help..weird noise

[subliminal.1324]

so. this has been going on for a while now and im not sure whether or not its major or not. im pretty new to the forum, curretnly 04-6 auto. when driving normal on drive cars fine. however if i hit it big time usually around 50+ the car makes a somewhat squeaky voice when it shifts. its pretty loud and noticeable. the cars got about 48k on it. and since i cant pop the hood doing about 80 its sorta hard to really know what the problem is..anyone else have this problem? and any help on whether this is major or not or how to fix it would be greatly appreciated. thnx

btw sorry if i posted in wrong thread..but really sure

 

[wannabe]

does it do this with the A/C off? it may be your serpentine belt...

actually i was just browsing around and found this:

The squeak on my car was fixed.

On my service record it lists the following:

Cause: 9A
10001 Replace seal 50203XRX
368 WAR 0.50
1 L3A1-40-581 RING, SEAL

they replaced a gasket between the exhaust manifold and catalytic converter.

 

[subliminal.1324]

im not sure. i took it out yesterday and tried the same. it didnt make any noise..ac was off then. ill try both and let u know.