I had this issue start up about last week. When the gtp hits high rpms, it makes this awful "chirp" and prevents me from shifting. i tried greasing up the tensioners, checked all my pulley bearings and i don't feel any resistance. but i still feel the engine struggling half the time.***Also already changed both belts.

http://www.youtube.com/watch?v=2NRxj5stQ-g

any comments would be appreciated.

That sounds mechanical to me.
I'm thinking a bearing ... maybe in the supercharger itself?

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2005 GT owner [Non S/C] with a "big DIC".
Two years later and I still love the car.
Thanks Pontiac...Bleen is keen!

bump! this guys got my old car, we need to fix this thing!

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Definately a bearing.. I would say. But which one? Who knows. Sorry

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Sounds again like a bearing...

Check out the alternator. Take it off and see if anything is strange...

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2012 Ford Focus SE Sport
2012 MINI Cooper Clubman

I have ADHD and drive a Focus. Ironically.
Although gold dust is precious, when it gets in your eyes, it obstructs your vision.

That sounds a lot like something in the bottom end. Kicker is...you don't accelerate quickly...and if the thing spun a bearing, it will accelerate slow. But, by the same token, it should sound like that at idle, too. Pull the oil filter, and see what is in it. Take a pic and show us.

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One Big Ass Mistake America

took a "stethoscope" (radiator hose... empty radiator hose) and listened to all the pulleys. alternator seemed fine, and its putting out 14v

-- Sat Jul 31, 2010 1:10 am --

spun bearing? definitely worth looking into. will post update and pictures

take the belts off and run it for a minute --- you'll eliminate all pulleys and SC that way. take it from there.

Yeah, this is true. He can get away with starting with a COLD engine, and then running it up through first gear and back, and will be OK. But, let's see a pic of what is in the oil filter.

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One Big Ass Mistake America

so i have ran it without the s/c belt on and didn't have the issue. will post a pic asap of the oil filter. now work is an issue... 50 miles a day so will update when i can, thanks for the input guys

Well now you know that it's on the S/C belt and not a spun bearing. Most likely an idler... Mine made a chirping noise that evolved into a grinding noise that evolved into locking and turning the plastic pulley into dust...

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2012 Ford Focus SE Sport
2012 MINI Cooper Clubman

I have ADHD and drive a Focus. Ironically.
Although gold dust is precious, when it gets in your eyes, it obstructs your vision.

Yeah, I would agree with Mike here. The only other possiblity would be bearings in the blower. Typically, an idler bearing will make noise all the time. Spin the pulleys up in the blower belt system by hand, and see if any make noise or feel rough. If they do, replace them.

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One Big Ass Mistake America

how does the snout feel any play or nice and tight when you spin it?. my SC sounded like it was full of rocks when the coupler got a bunch of slack and went out

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater