Try to go a little tighter on the throttle valve cable (kick down cable). The 3-4 shift is computer controlled via apps position.
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2004 2500 Shortbed reg cab 2wd, Goerend triple disc, Fleece holset, BBi stage 1.5, Fleece 10mm cp3, FASS 150. Best ET to date 11.36@120 with firepunk tuning.
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