Did the transmission shop scan your car, or were they just guessing when they changed the mlps and tps? ACT, ACC, BOO, ECT, MAF, MLPS, OSS, TOT, TPS, and VSS are all sensors that have input signals to the transmission. What convertor are you using? Is it a lockup or non-lockup? Does your chip take the lockup out, or does it leave it alone? I dont understand the part about your chip having something to do with your gear selection. You do have a VSS with a plastic gear on it, dont you?
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