My 2006 hemi 545rfe tranny had a p0700 and p0841 and p0944 error. All were detected by my OBDII scan tool from Sears. After searching this forum and other site forums, I suspected that since the problem was sudden (worked one night and wouldn't shift the next morning) that it probably was not a failure. But who can tell until a tech digs into the tranny.
Turns out the issue was due to the main transmission filter coming loose from the pump seal. seal was replaced, tranny flushed and my jeep is back and running for $281. It could have been much worse.
You issues could be related to the filter if it uses the same one mine does. One of the other symptoms of my model is the upper filter tube that fits into the pump seal will split and cause a fluid draw problem due to it sucking some air through the split in the plastic.
best of luck.