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Power Strokes
7.3 Aftermarket
tuners; transmission control inputs
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[QUOTE="mandkole, post: 1227265, member: 4630"] Steven, In either 3rd or 4th, the pcm will often command a very brief unlock after the TC was commanded to lock. It then will relock and if your still giving it a load, it will do it again.. Its always a very low throttle application (20-30%) and usually when on a light grade. Once its unsuccessfully commanded a few unlock/locks it will set a 0741 code. If I override the pcm with the TC switch, it will stay locked (but you can still see the pcm trying to command unlock/lock in same conditions). Often a code has been thrown. The question is why is the PCM commanding unlock-- is it in the tuning or is it mechanical? I need AE to see the slip% (the scan gauge wont show it) to see if the PCM is commanding unlock due to excessive slip. Theres a thread in the tech section that Mark K has spent a lot of time discussing. [/QUOTE]
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