602 is a microprocessor and/or a programming issue with the PCM. 700 is a generic code for a transmission problem. This one could be caused by the 602 code. Basically to fix this, you have to have the PCM reprogrammed first, then if the code comes up again, the PCM has to be replaced and programmed to your truck. Then if you still have a transmission code, it will have to be addressed. Shop shops can do this work. Much cheaper than a dealer.
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