Thanks for your response.

I got the tranny from a local yard that specializes in Mitsubishis, so this was the yard's mistake. I am hoping they still have the truck that this came from so they can give me the switch or find me the right tranny. I'll be calling them tomorrow.

I downloaded the FSM, do you know if this switch is described in the FSM? I could probably wire it up myself, but need the pinouts from the connectors.