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p0700 is a sub code indicating that there is a code in the trans side of the pcm. Like the p0740.
P740 is a lockup torque converter code. If the trans is a new reman unit than double check all the connetors and make sure they are plugged in. If its a junkyard trans than its possible that you need another trans. Most of those codes arent caused by any soleniods but rather an internal problem.