They can't just "void your warranty" for the entire car. What they can do, is determine that a modification you made caused a problem with the car, which voids the warranty for the problem area.
There was an issue with early, aggressive tunes. It's been a while since I've seen a tune cause a problem, and it's been even longer since I've seen Ford actually cancel a powertrain warranty for one. It seems that Ford is quietly taking care of most people that are having issues.
However, they did issue this TSB (image below). I'd suggest reading this blog, I think it explains the issue fairly well: http://www.speedsportlife.com/2011/0...big-of-a-deal/
There was an issue with early, aggressive tunes. It's been a while since I've seen a tune cause a problem, and it's been even longer since I've seen Ford actually cancel a powertrain warranty for one. It seems that Ford is quietly taking care of most people that are having issues.
However, they did issue this TSB (image below). I'd suggest reading this blog, I think it explains the issue fairly well: http://www.speedsportlife.com/2011/0...big-of-a-deal/
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