Drivers side rear noise

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Razorboy

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I have got a 69 lemans convertible with a noise on the driver side rear area that sounds like two pieces of metal slapping together. Like something is binding then snapping back. I only hear it when making a left turn. I’ve got drum brakes and have checked springs and shoes and all looks good with them. I’ve looked at the shocks and everything seems to be tight. I checked all the clamps in that area as well. I did measure the two rear fender wells and the driver side is sitting in an inch lower. Any ideas what this could be ? Thanks4216
 
do you have a limited slip differential?
if you do, when is the last time you changed the fluid and added two bottles of the GM additive?
 
Unsure on both; I’ll check. Don’t know much about the previous owners maintenance.
Thanks
 
The only other thing I can think of would be in the trunk, check the lower right portion of the trunk, there is a small extension area that I have seen things accumulate in, it could just be something rattling around in the trunk.

Or a loose exhaust system if it has a right side tail pipe. Other less common things it could be a broken rear spring, a binding lower or upper control arm.
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I checked the rear fluid level; it was just under the fill plug. I gave it additive to level.
Still hearing the noise. Have checked the springs and shocks and they look good.
Any other ideas you on what could be causing it? I appreciate the input. Thanks
 
Do you have the rubber insulation boot on the top of the rear springs? Click on the link below.
Did you check the exhaust system as suggested above?

 
Yeah the rubber boot is there on both springs, and exhaust and clamps are tight.
 
Is there a way to replace the gear oil other than removal of the cover? Didn’t see a drain plug.
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The drain plug is on the passenger side of the cast iron differential housing, not the cover.
 
I see the fill plug on the passengers side but no drain. Thanks
 
there is no drain, you have to use a hand pump to drain the rear or pull the cover.
 
ok Thanks!
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