I am trying to repair the transmission, I put two shift solenoids in?

I am trying to repair the transmission on My granddaughter's car. I put two shift solenoids in it and put it back together. No more check engine lights on anymore. I found, as others did too, that when I have it in park it works but all the other positions make the car go forward. I was checking the different gears and I found out that each gear except park makes the car go forward even reverse. In researching I saw other posts that spoke of the pnp needing a tool that indexes the shifter. It said it is a J41545. Where can I find one of these? Thank you