i've noticed that mine grinds from 6th to 5th on a downshift at highway speeds every so often, makes me grimace every single time, wonder whats up with it...
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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