rattling noise at idle

Whitecougar

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#1
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MAKE:ford
MODEL:fusion
YEAR:2008
MILES:165k
ENGINE:3.0l v6
DESCRIBE ISSUE....Extremely loud rattling noise from transmission torque converter area during idle. No noticeable change in performance while driving.
 

billr

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#2
Noises are notoriously hard to identify as to where they are coming from, are you sure it is from the TC area and not an exhaust rattle or a loose engine mount?

There should be a cover on the TC area that is easy to remove. Check for a loose or missing screw that fastens the TC to the flex-plate (flywheel) or a cracked flex-plate; see if any debris or broken pieces are rattling around in there. Noises are notoriously hard to identify as to where they are coming from, are you sure it is from the TC area and not an exhaust rattle?
 

nickb2

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#3
Agree with Bill, when idling, the converter heat shields rattle quite loudly and they are in very close proximity as the 3.0l has two cats on each side.

Also, maybe a honeycomb disintegrating. Any check engine light on?

Left and right manifold have heat shields that may have busted a few spot welds.
 

jd

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#6
If nb2 thinks these cats are a honeycomb/monolith, you can get under the vehicle and hit the bottoms of the cats with something that won't dent them. You are trying to get them to shake. Listen for loose pieces inside. The cats with granules inside will sound like can of coffee beans, but monolithic cats should be solid and quiet.