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Wierd Knock only after driven for a bit?

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Old 06-04-2013, 05:03 AM
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Car: 91 Camaro RS, 84 2.8 5speed
Engine: 305 5.0L
Transmission: Auto, 5 speed
Wierd Knock only after driven for a bit?

Hello, my 91 RS runs perfect when I start it up and drive around, but after say 10-20 miles it looses a bunch of hp. After start up, when the car switches gears while driving, it smoothly switches gears(with only a slight kick), but after driving around the gears switch horribly, like I feel the car fall back and weakly come up in gear. When this is happening, if I hit the gas, I can hear a knock like almost on top of the engine, but it doesn't knock in park or neutral.

The knock is like a metal piece hitting something over and over, faster with higher rpm, It sounds belt related though.

Any suggestions? Sorry if I didn't explain this too well.
Old 06-04-2013, 09:41 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Wierd Knock only after driven for a bit?

Sounds like you may need to look for a new/rebuilt short block.
Old 06-09-2013, 04:35 AM
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Car: 91 Camaro RS, 84 2.8 5speed
Engine: 305 5.0L
Transmission: Auto, 5 speed
Re: Wierd Knock only after driven for a bit?

I mean it sounds like something to do wit the belt, but as i said, car runs amazing when its not heated up, also my oil pressure stays right above red at idle in drive.
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