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post #1 of 10 (permalink) Old 10-04-2015, 10:41 PM Thread Starter
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96 Tbird rattle

I have a rattle that is giving me fits. I just realized it is coming from the area of the flex plate/ torque converter. It only rattles when accelerating, never happens at idle or when in park. It happens in drive, but it's worse in reverse. Sounds like a bolt in a can being shaken. I removed the exhaust and found nothing, then in desperation put it on a lift and it was easy to tell it was coming from the area of the torque convertor. I removed the cover to inspect the flex plate and could find nothing that looked like it was hitting. A little history on the car, it has 62,000 miles and had a driveshaft vibration when I bought it, since then I have replaced the carrier assembly, driveshaft(fixed the vibration) and the tailshaft bushing.
Any help would be appreciated.
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post #2 of 10 (permalink) Old 10-05-2015, 07:52 AM
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Loose tc or flywheel bolts?

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post #3 of 10 (permalink) Old 10-05-2015, 09:07 AM
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post #4 of 10 (permalink) Old 10-05-2015, 11:04 AM
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Bad rod bearings, #8 in particular, would emanate most prominently from the lower bellhousing area.

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post #5 of 10 (permalink) Old 10-05-2015, 06:52 PM Thread Starter
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Hopefully, this link works. My posting skills are not the best.

XR7, I was thinking rod bearing myself, however not for sure. It only makes the sound when it's in drive or reverse, never in park or neutral. This car has been parked for drive train issues almost since i bought it and unfortunately will have to remain so until I get this straightened out. Good thing my wife is understanding and likes Thunderbirds !
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post #6 of 10 (permalink) Old 10-05-2015, 08:26 PM
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How are your u-joints.?


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post #7 of 10 (permalink) Old 10-05-2015, 09:14 PM Thread Starter
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Sorry about that Maic, it should be viewable now. As for the U-joints, they have all been replaced.
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post #8 of 10 (permalink) Old 10-05-2015, 10:55 PM
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damn... is the engine suppose to move that much when you put in gear?

it sounds like either mechanical fan contacting the shroud or the flex plate contacting something.
have you been under the car? inspection plate in place and all the bolts tight?

Might be a broken flex plate.

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post #9 of 10 (permalink) Old 10-06-2015, 08:51 AM
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Doesn't sound like rod bearings. At least none I've heard. Nor mains. Only does when going into gear. Never while driving or kicking down into passing gear? I'll agree with Grand Marq that it sounds like the sound of a fan hitting the shroud in a tradition engine driven fan car. Or air pump noise. But we have neither on our cars and you say it coming from the bell housing area.

Bad motor mount letting things flex? Loose starter? I assume it doesn't make the noise when starting. If it did it sounds kind off like starter to ring gear chatter. And in some ways it does sound like a exhaust leak. But those are normally a constant noise. Leaking EGR tube or fitting that only flexes on initial trans engagement?
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post #10 of 10 (permalink) Old 10-06-2015, 05:50 PM Thread Starter
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It will when accelerating and sometimes when going up hill, however if I really put my foot into it or go WOT no rattle. Definitely coming from the bell housing. There is some motor movement but I didn't think it was excessive, but I'm no expert. I'm going to put it back on the lift this weekend and take another look. I did remove the flex plate cover last weekend to inspect it. All the bolts seem tight with no sign of either the flex plate or the bolts hitting anything.
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