4R70W 3-4 Solenoid OBD1 Code

This may sound like a rather basic suggestion — it is, I know — but try looking at the solenoid packs again. Are you sure that you have the proper replacement solenoid? If you are certain the replacements are proper, have you installed them in the correct positions? It is very easy to slip a solenoid pack into what you think is the right spot only to find out later that the solenoid is the wrong device.

I’d suggest that you pull out the solenoid packs and then make sure that the 1-2 pack goes into the right carrier and the 3-4 pack goes into the right carrier.

I’d also suggest making sure that the electrical connectors are properly inserted. It is easy to turn things around so that the plug is actually wired in backwardly. In this case, even though the resistance may look as if it is correct, it is entirely possible that because the connector could be backwards. There are some connectors in vehicles that can easily be placed in so things are backward.

Let me now what happens if and when you check things and change things around.