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  1. 99-03 7.3L Performance Parts
    Hi guys i bought a 2001 f250 with a DP chip that was tuned with a 4r100 transmission. The previous owner had an upgraded trans put in(hd4r100) but did not re-tune the chip. Do i have to re-tune the chip to the HD4r100 trans? Im also new to this site so cut me some slack if i get anything wrong...
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