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2005 Mustang GT: Startup Rattle

1322 Views 5 Replies 4 Participants Last post by  cman
when i start the car up.. right under the drivers seat, or a litttle infront of that, under the car im hearing a wrattling.. could this be becuase the car is cold on startup? this only happens for 3-5 mins or so.
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Its probably the transmission shield.
http://www.allfordmustangs.com/forums/1513442-post8.html
it is an automatic - sorry for the late answer.
Then it's not the plate hitting the flywheel.
Could a exhaust heat sheild buzzing or perhaps a bad cat converter. If you can get under the car, try and hit this exhaust system with the palm of your hand or a rubber malet (this is with the engine and exhaust cold of course) and see if you can hear anything. I had a cat go bad after about five years and it rattled a lot at first start up until the exhaust flow pushed all the loose broken pieces to the rear of the unit while driving.
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