Developed a nasty rattle at the end of my cruise tonight, help appreciated

oldmansmonte

G-Body Guru
Thread starter
Oct 29, 2010
572
63
Buffalo, NY
Ok now it's getting weird. Start the car up today, sound is gone. Drove around the block, runs and drives fine. No sound. Put it up on jacks, the flex plate and torque converter has no weird wobbles or anything. Everything looks and appears fine on a basic inspection. I'm going to take it out for an extended drive in a bit and see if it comes back.
 

oldmansmonte

G-Body Guru
Thread starter
Oct 29, 2010
572
63
Buffalo, NY
A friend suggested the flex plate bolts could be loose. I checked, those suckers are in there. Taking it for a drive in a minute.
 

vandyman

Apprentice
Jul 16, 2017
68
18
Flex plate covers can cause the sound you are hearing. I tried an aftermarket plastic one that caused havoc.
 
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oldmansmonte

G-Body Guru
Thread starter
Oct 29, 2010
572
63
Buffalo, NY
Drove t about a half mile and the sound came back. Again runs and shifts perfect.

New vid. Sound seems like it's coming from the tail section of the transmission area near the cats.



I know its more likely a bad news thing like a transmission or torque converter issue, but I really want to say its int the exhaust. Like something broke loose in one of the cats and it rattling. Wishful thinking I guess.
 
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oldmansmonte

G-Body Guru
Thread starter
Oct 29, 2010
572
63
Buffalo, NY
Think I found it, shift lever is loosey goodsey and bouncing off of the one header tube. Seems to be loose from the top.
 
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64nailhead

Goat Herder
Supporting Member
Dec 1, 2014
3,612
113
Upstate NY
Excellent!
 
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