Is the transmission solinod the only computer in a transmission

1) A solenoid is not a computer, its just a switch fed from low amperage to switch a higher amperage component. 2) a Transmission may have several solenoids

The dodge dealership told me the transmission and the computer on the firewall has to match so if I change the solenoid block can I get it to work

The problem I have with what the dealer told you is that the ECM's (car computer) come pre-programmed so they're "Plug n Play." When you buy a ECM the same model is used for a car with an automatic or a manual transmission. So, match the computer to transmission? I don't understand.

If u look on the top of the transmission it has a three number and two letter tag on it like mine is 291AD my old transmission had it on it the car has three computer one is in the key switch one on the firewall and the last one is on the transmission and my new transmission does not match and the car won't start

I have a 2006 PT cruiser touring it only drives in low never shifts chk omg light is on all ther gears work. I changed the exterior at sylenoid that changed nothing codes then gave imputes codes and electrical codes what does this mean ty