Long time no see! Need help on tranny

[Dug]

Hey the H2 has around 200k on it now and its pretty well beat to a pulp. Anyways last week the transmission lost 1st and overdrive. On top of this problem the key wont shut off.
After searching here I found someone that had a similar problem as me. Does anyone know if this keyswitch problem makes the transmission not work? Thank you for any hints or ideas. I want to do some diagnostics before I pull the tranny out thats for sure. Thank you ,doug