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1. check your tires for rips and tears, feel for bubbles on the side walls in and out, feel with your hands the surface of the tire tread to see if there might be a bubble or a tare/rip. that could be the problem. 2. could've driven on a bumpy road lately/or hit a decently sized pot hole to knock you tire balance off, go to your local tire shop and have them do a tire blanace/aliginment/rotation. that should take care of your problem. 3. it could be your rear end, mustangs v8's suffer from the legendary pinon & ring problem in the 8.8 gears. that is a costly fix so fix your tires first then if it countinue its eaither ur rearend or ball joints worn but not to the point of making noises when turning or you are suffering from a vacum leak somewhere, lastly it could be your catylack converter inside your transmission but i highly doubt that one because it only occurs at higher speeds and gets worse as speed increases.

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16y ago

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