2004 Jeep Liberty

I’m getting po700 (general transmission probs), p0837 and p0839 codes – 4 wd high voltage swith codes.  also part time dash message is mostly on (sometimes intermittent – on/ off)

I thought I saw a post elsewhere indicating I can change out a switch… can’t find it again, don’t know where or how to change out the switch if really possible.

any idea or help would be appreciated

thanks /jh