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#1
11-28-2006, 12:28 PM
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2004 f150 4x4
put 35 inch tires on 2004 f150 with auto trans told i would need to buy proformance chip to recalbrate trans and engine for speedo too is this correct
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#2
11-28-2006, 02:55 PM
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Re: 2004 f150 4x4
as far i know, no. you can recalibrate speedos for different tyre rolling circumfrences. i think the performance chip thing is people trying to get more money out of you.
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