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Old 03-27-2010, 06:42 PM   #1
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Default Weird noise

I have a 1993 SSEI Bonne - the problems I'm having is this noise like a screeching noise when I give it gas. all the belts are fine. It almost seems like the transmission is screeching like a metal to metal sound. Okay this what I do, It drives in reverse the car will move its when I give it gas is when It starts this screeching noise and when I let off it stops. Its to the point I dont want to drive it. The fluid needs to be changed and it was low and blackish color, I added fluid to the trans, it idles fine and it will go into every gear until you give it gas. what would it be. its got me stumped. The sounds like almost like a fan hitting metal very high screeching noise.

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Old 04-01-2010, 06:18 AM   #2
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air conditioning pump- especially if you're ac doesnt work. i just dribble some oil on mine.
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Old 04-01-2010, 07:54 AM   #3
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Your post is a bit confusing.
Does the transmission slip when you apply throttle?

First crazy thought, almost sounds like a flex plate. Pull the inspection cover and take a look.
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Old 04-01-2010, 09:55 AM   #4
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Lets rule out the AC clutch first. Read this, https://www.gmforum.com/mechanical-134/adjust-ac-clutch-plate-278951/ See if that helps.
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Old 04-15-2010, 02:43 AM   #5
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Quote:
Originally Posted by BillBoost37 View Post
Your post is a bit confusing.
Does the transmission slip when you apply throttle?

First crazy thought, almost sounds like a flex plate. Pull the inspection cover and take a look.
No it goes in every gear, The AC works by the way. its so weird because it idles fine, it even goes in reverse, it goes in first gear, second gear, third gear and Overdrive, and moves with a little bit of gas pedal but right when you give it gas not stomping on it but just to take off it makes that (yikes) screeching noise. I dont even want to drive it. Also if its a flex plate how do I know or what do I look for to know its bad. I just put a new starter in this car so, I'm not going to rule out that its a bad flex plate. Also the new starter is a Duralast Gold which is a lil smaller then the original but a brand new one and not reman.

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Old 04-15-2010, 07:14 AM   #6
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If you say the trans fluid is black, then I would highly recommend you change your fluid and filter. If its what I think it is, it might be the trans oil pump starving for oil because the filter is clogged(which causes a screeching sound) That happened to me a couple years back when I broke my differential pin and metal shavings clogged up the filter.
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Old 04-15-2010, 08:32 AM   #7
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I see a couple potential items here.

The flex plate. This can be kinda looked at by crawling under and removing the plastic inspection cover between the engine and trans. Look for any broken looking metal etc. Not the easiest thing to see, but you can at least see it.

The starter, yes, your new starter if not in the proper place can make noise. If the flywheel is contacting the starter when the engine is running..this can cause problems. Refer to the starter instructions. It shouldn't make any odd noises when starting the car either.

Trans fluid, If the fluid is bad enough this can case starvation of fluid to the trans and that could cause noises like Mike said.
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Old 04-15-2010, 09:12 AM   #8
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Start with changing the fluid and filter. Then when under there you can remove the inspection cover and check the flax plate.
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Old 04-19-2010, 09:15 AM   #9
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Quote:
Originally Posted by BillBoost37 View Post
I see a couple potential items here.

The flex plate. This can be kinda looked at by crawling under and removing the plastic inspection cover between the engine and trans. Look for any broken looking metal etc. Not the easiest thing to see, but you can at least see it.

The starter, yes, your new starter if not in the proper place can make noise. If the flywheel is contacting the starter when the engine is running..this can cause problems. Refer to the starter instructions. It shouldn't make any odd noises when starting the car either. It doesnt make a noise when you start it or even when its running, its only when you start to give it more gas. You can give it a little gas and it will move on all gears, but not if you try to drive it normal.

Trans fluid, If the fluid is bad enough this can case starvation of fluid to the trans and that could cause noises like Mike said.
You know Bill you are alot smarter then most and I believe you are correct, It most likely is my flexplate, I had a mechanic listen to it and he says its a flexplate. It never happened before until after I put in the starter, the starter was a little smaller then the original and I drove for about a week and all of a sudden this happens. Do you think having the starter being smaller the original the little cone is hitting the flexplate?

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Old 04-19-2010, 10:29 AM   #10
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Not at all. The flex might have had something to do with the starter dying though.

The starter turns the flywheel by engaging the teeth on the outside of the flywheel. The typical flywheel failure would be cracking/breaking at the bolts that hold the flywheel to the crank. Being that we put all our power through them and then through the torque converter bolts, it'* tough to fathom that a slow spinning starter (in comparision to revving engine rpms) could exert enough pressure or force to hurt the flywheel vs the torque we put through them to the ground.

If you remove the front mount etc, you "might" (don't quote me) be able to have enough room to sneak in and change the flywheel w/o having to pull the motor totally out. It would be a tight squeeze though.
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